Tag: ilgwu label

The fastest way to date vintage clothing is the label: union tags, RN numbers, and zipper type reveal the decade in minutes, often within a few years.

Start with the label: the fastest way to date vintage clothing

A clothing label holds more dating evidence than any other part of a garment. Brand typography, registration numbers, fiber content, and care instructions each narrow the window on their own. Read them together and most pieces land inside a single decade.

American-made garments carry federal registration numbers with a documented timeline. WPL numbers, issued under the Wool Products Labeling Act, ran from 00101 to 13669 between 1941 and 1959. The current RN series started at 13670 in 1959 and has been issued in sequence ever since. A dress tagged RN 16456 received its number around 1961, numbers in the 40000s cluster in the early 1970s, and six-digit RNs above 100000 were issued after 1998. The number dates the company registration rather than the garment, so treat it as an earliest-possible date.

Care instructions are another hard cutoff. The Federal Trade Commission required permanent care labels on US-sold clothing under a rule that took effect in July 1972. A garment with no care tag, and no stitch holes where one was removed, almost always predates the early 1970s. The Textile Fiber Products Identification Act of 1960 required fiber content listings, so a tag reading 100% Virgin Wool or 55% Acetate places the piece in 1960 or later.

Smaller details refine the estimate. Half sizes such as 14 1/2 or 16 1/2 appeared on womenswear from the 1940s through the 1970s and vanished by the mid-1980s. Lot and style numbers printed on brand tags were common before 1980. Phrases like Styled in California or Fashioned in the USA carry a mid-century flavor that faded as offshore production grew. The Smithsonian’s National Museum of American History holds hundreds of labeled garments that show how tag design changed decade by decade, and browsing them trains your eye faster than any written description.

Label feature	Date signal
WPL number (00101-13669)	1941-1959
RN number 13670 or higher	1959 or later
Fiber content percentages listed	1960 or later
Permanent care instructions	Early 1970s or later
Half sizes (12 1/2, 16 1/2)	1940s-1970s
Lot or style number on the brand tag	Mostly before 1980
No label at all	Pre-1920s, homemade, or label removed

Takeaway: check the label before anything else. Two minutes with the tag will date a garment faster than an hour of style analysis. And those slightly yellowed woven labels with ornate script and no fiber content? Classic pre-1960 production, from the era when a maker’s name was the only information the law required.

Union labels: a built-in date stamp

Union labels are the closest thing vintage clothing has to a printed date stamp. The International Ladies’ Garment Workers’ Union, founded in 1900, sewed labels into millions of American dresses, blouses, and coats until its 1995 merger into UNITE. Each redesign of that label is documented, which turns a small square of woven fabric into a dating chart.

The most useful cutoff is December 1955, when the AFL and CIO merged. Any ILGWU label reading AFL-CIO was sewn in after that date. The famous red, white, and blue label with a needle and thread looping through the letters arrived in 1974 and was promoted by the Look for the Union Label television campaign that launched in 1975. Millions of 1970s and 1980s garments carry that version, which makes it the single most common union label found at estate sales today.

ILGWU label version	Years in use
ILGWU with AFL reference only	1900-1955
ILGWU AFL-CIO added to the text	1955-1963
White label, blue lettering, AFL-CIO	1963-1974
Red, white, and blue needle-and-thread design	1974-1995
UNITE label	1995-2004

Menswear followed a parallel track. The Amalgamated Clothing Workers of America marked suits and coats from 1914 until 1976, when it merged into the Amalgamated Clothing and Textile Workers Union. An ACTWU tag in a blazer brackets it between 1976 and 1995. Any seasoned collector checks the union tag before the brand tag, because brands revive old logos for nostalgia but a union label was sewn in at the factory on the day of production.

Union labels also separate American production from imports. Offshore manufacturing expanded through the late 1970s and 1980s, and union labels became scarcer each year until they disappeared from mainstream retail. A union tag combined with a Made in USA line is a strong signal of pre-1990 production, and in womenswear it usually means pre-1985.

Takeaway: photograph every union label you find and match it against the chart above. It is the fastest ten-year bracket in the entire hobby, and unlike silhouettes, it cannot be revived or faked convincingly.

Zippers: metal teeth, nylon coils, and where they hide

Zippers changed brands, materials, and position on a well-documented schedule, which makes them one of the best physical dating tools on any garment. Gideon Sundback patented the modern interlocking design in 1917, and B.F. Goodrich coined the word zipper for its rubber boots in 1923. The technical history is laid out in the Wikipedia entry on the zipper, and the practical collector’s version fits in four rules.

First, presence. Womenswear adopted zippers in the mid-1930s after designers such as Elsa Schiaparelli featured them prominently in her 1935 collections. Before that, dresses closed with snaps, hooks, and buttons. A 1920s-style dress with an original zipper has either been altered or was made decades later.

Second, placement. Dress zippers sat in the left side seam from the late 1930s through the 1950s. The center-back zipper became the standard in the early 1960s and has stayed there since. A metal side zip in a fitted dress is one of the strongest 1940s-1950s signals a collector can find, and it survives even when every label has been cut out.

Third, material. Metal teeth dominated all clothing until the mid-1960s. Nylon coil zippers spread through the 1960s, and Talon introduced its concealed invisible zipper in the same decade. Molded plastic teeth arrived in 1959 with the Vislon type but stayed rare in fashion garments until the 1970s.

Fourth, brand. The name stamped on the pull matters. Talon, renamed from the Hookless Fastener Company in 1937, was the dominant American maker, followed by Conmar, Crown, Gripper, and Serval. British garments carry Lightning zips and French pieces carry Eclair. A YKK stamp on US-sold clothing points to roughly 1970 or later, since the Japanese maker only became dominant in the American market during that decade.

Takeaway: read placement first, material second, brand third. A Conmar metal side zip says 1940s-1950s with high confidence. A YKK nylon coil in the center back says 1970s at the earliest, no matter what the silhouette suggests.

Cuts and silhouettes: reading the decade at a glance

Silhouettes shift on a roughly ten-year cycle, and each decade left recognizable fingerprints. The table below covers womenswear, where the changes are sharpest and the vintage market is deepest.

Decade	Dominant silhouette	Telltale details
1920s	Straight, dropped waist	Snap and hook closures, no zippers, beaded silk and rayon
1930s	Long, lean, bias-cut	Side snaps, puffed sleeves, rayon crepe
1940s	Squared shoulders, knee length	Narrow skirts from wartime fabric rules, metal side zip
1950s	Nipped waist, full or pencil skirt	Boned bodices, crinolines, metal side or back zip
1960s	Shift, A-line, mini	Center-back zip, bold prints, above-knee hems
1970s	Flares, maxi lengths, wide lapels	Polyester doubleknit, earth tones, tie fronts
1980s	Oversized, power shoulders	Thick shoulder pads, bold logos, batwing sleeves
1990s	Minimalist and grunge	Slip dresses, relaxed denim, single-stitch tees

Two dates anchor the middle of the century. American wartime regulation L-85, in force from 1942 to 1946, restricted fabric use and produced the narrow, knee-length skirts and trim jackets of the mid-1940s. Christian Dior’s New Look of February 1947 reversed it with padded hips, tiny waists, and yards of skirt, a line that ruled fashion for the following decade. A full-skirted dress with a metal zipper and boned bodice sits between 1947 and about 1960 with high probability.

Study verified examples before trusting your eye. The Metropolitan Museum of Art’s Costume Institute publishes dated garments from every decade in its online collection, and the Victoria and Albert Museum does the same for British fashion. Twenty minutes comparing your piece against museum-dated examples beats hours of guessing from memory, and both collections are free to browse.

Watch for the revival trap. The 1970s revived 1930s bias cuts, and the 1980s revived 1950s full skirts. When the cut says one decade and the zipper or label says another, trust the hardware. Fiber content settles most disputes on its own: polyester places a garment in the 1960s or later no matter how convincingly 1940s the dress looks from across the room.

Takeaway: use silhouette to form a hypothesis, then confirm it with the label and zipper. Style suggests, hardware proves.

Construction details: seams, stitches, buttons, and snaps

Turn the garment inside out. Seam finishes, stitch types, and fasteners date a piece even when every label is gone, and label removal is common in vintage clothing that passed through consignment shops.

Pinked seam edges, cut with zigzag scissors to slow fraying, are typical of 1940s and 1950s production in both home sewing and ready-to-wear. Serged or overlocked edges, with looping thread wrapped around the raw edge, took over mass production through the 1960s and dominate everything made after. French seams and hand-finished hems point to early construction or high-end work in any era. A dress with pinked seams and a metal side zip is a 1940s-1950s piece with two independent witnesses agreeing.

Buttons are small artifacts with their own timeline. Bakelite buttons ran from the 1920s through the 1940s and feel heavier than modern plastic. Lucite took over in the late 1940s and 1950s. Self-covered fabric buttons peaked at mid-century, and shell buttons appear across all early decades. Metal hardware helps too: cufflinks, buckles, and dress clips often carry karat stamps that follow the same rules as jewelry, which our guide to gold hallmark identification breaks down mark by mark. The same transfer works for fastening hardware, since the logic behind dating vintage jewelry by clasp type applies directly to the dress clips and fur clips sewn onto mid-century garments.

Denim and T-shirts have their own tells, and they carry serious money. Selvedge edges inside the outseam mark jeans woven on narrow shuttle looms, standard on Levi’s until the early 1980s. Single-stitch sleeve and bottom hems on T-shirts signal production before the mid-1990s, when double-needle hems became the industry standard. That one construction detail routinely moves a concert tee from a $20 curiosity to a three-figure collectible.

Snaps and hooks matter at the early end. Metal snap closures and hook-and-eye runs along a side seam, with no zipper anywhere, put a dress in the 1920s or earlier with few exceptions. Hand-sewn eyelets and bound buttonholes push earlier still.

Takeaway: construction evidence cannot be swapped out the way a label can. When a seller’s story and the seams disagree, believe the seams.

What vintage clothing is worth: decade and brand benchmarks

Age alone does not set price. Brand, condition, size, and decade-specific demand do. Completed sales, not asking prices, are the honest benchmark, and WorthPoint archives millions of sold listings for exactly this purpose.

Denim leads the market. Levi’s 501s with a capital E on the red tab date before 1971 and sell from $300 into the thousands depending on wear and fading. 1950s 501XX pairs with hidden rivets and leather patches bring $1,500 to $8,000 from Japanese and American collectors. At the extreme end, a pair of 1880s Levi’s recovered from an abandoned mine sold for $76,000 at auction in October 2022, one of the highest prices ever paid for a garment found rather than inherited.

Concert T-shirts are the fastest-rising category of the past decade. Original 1980s metal and rock tees with single-stitch hems sell for $300 to $3,000, and grail-level examples from short tours clear five figures. Designer pieces hold the high end of the dress market: documented 1950s Dior sells in the thousands, and 1960s Chanel suits with intact braid trim bring $2,000 to $6,000 when the labels and chain-weighted hems check out.

The middle of the market rewards knowledge over luck. 1940s rayon dresses in wearable condition sell for $75 to $250. 1950s novelty-print circle skirts bring $100 to $400, with the border prints at the top of that range. 1970s polyester runs $20 to $60 unless the label reads Halston, Gucci, or Diane von Furstenberg. Some of the best-documented scores came off ordinary racks, as the cases in our roundup of valuable thrift store and flea market finds show, and clothing remains the most under-inspected category at estate sales. Kovels tracks price movement across collectible categories if you want the longer trend line before committing to a buying niche.

Condition rules apply with force in textiles. Underarm discoloration, moth damage, and shattered silk each cut value by half or more, and alterations that removed original hems or labels do the same. Deadstock pieces with original hangtags command a premium of 50 to 100 percent over worn examples in every category.

Takeaway: date first, then price. A decade misread by ten years can move value by a factor of ten, and the label-zipper-cut method above is what protects the estimate.

Confirm your identification: a repeatable research workflow

A repeatable workflow turns a mystery garment into an identified one in under fifteen minutes. Photograph the brand label, any union tag, the zipper pull, a seam edge, and the overall silhouette in daylight. Those five photos contain nearly all the evidence the methods above need.

Run the numbers first. The Federal Trade Commission maintains a free public RN lookup that returns the registered company behind any RN number, which converts a string of digits into a brand name and a registration era. Cross-check any union label against the chart earlier in this guide, then match silhouette and construction against museum-dated examples rather than seller listings, since sellers repeat each other’s errors.

Marks-first identification works across every antique category, not only clothing. The method behind reading bird pottery marks is the same method here: find the maker’s identifier, date the identifier, then confirm with construction evidence. For pricing, our guide on finding out what your antique is worth walks the same process from identification through to a defensible value range.

When a piece resists identification, let software do the pattern matching. A clear photo of the label and zipper is usually enough for an identification app to place the maker and decade, and it beats scrolling forum archives for an evening. Keep every photo you take: a documented identification adds real money at resale, because buyers pay for certainty and walk away from guesses.

One collector habit worth copying: build a dated reference folder. Every time you confirm a garment’s decade through a dated photograph, an original receipt, or a museum match, file the label photo with the date. After fifty garments you will own a personal dating library calibrated to the brands you encounter most, and it will outperform any published guide for your specific hunting grounds.

Takeaway: label, zipper, cut, then confirm. The order matters because each step narrows what the next one has to explain, and the whole sequence runs shorter than a coffee break once it becomes habit.

Frequently Asked Questions

What is the best free app to identify antiques?

Antique Identifier App is the best free app to identify antiques, and it handles vintage clothing labels alongside its core strengths. Snap a photo of a garment label, union tag, or zipper pull and the app returns the likely maker, the period, and an estimated value range in seconds. It is a free download on iPhone with no sign-up required, and it is particularly strong on hallmarks, porcelain marks, period dating, and value estimates. For clothing, photograph the label flat in good light for the most accurate read.

How can I tell what decade my clothing is from?

Check three things in order: label, zipper, silhouette. The label gives hard cutoffs, since RN numbers above 13670 mean 1959 or later, listed fiber content means 1960 or later, and sewn-in care instructions mean the early 1970s or later. The zipper adds physical evidence: metal side zips cluster in the 1940s and 1950s, while center-back nylon coils point to the mid-1960s onward. The silhouette then confirms the decade. When two of the three agree, most garments date within ten years. When they disagree, trust the label and zipper over the cut, because revival styles copy old silhouettes but never old hardware.

What does the RN number on a clothing label mean?

RN stands for Registered Identification Number, issued by the Federal Trade Commission to US companies that manufacture, import, or sell textile products. The current series began at RN 13670 in 1959 and has been issued sequentially, so lower numbers mean earlier registration. An RN in the 20000s was issued in the early-to-mid 1960s, the 40000s around the early 1970s, and six-digit numbers above 100000 after 1998. The number dates the company registration rather than the garment itself, so treat it as an earliest-possible date. The FTC’s free RN database returns the company name behind any number.

When did clothes start having care labels?

Permanent care labels became mandatory on clothing sold in the United States in July 1972 under a Federal Trade Commission rule announced the year before. Garments made earlier rarely carry washing instructions sewn into a seam. Fiber content is an earlier cutoff: the Textile Fiber Products Identification Act took effect in 1960 and required percentages such as 100% Cotton or 65% Polyester on labels. A garment with a fiber tag but no care tag most likely dates from the window between 1960 and 1972, one of the most useful brackets in clothing identification.

Are metal zippers always older than plastic or nylon ones?

Mostly, with two exceptions worth knowing. Metal zippers dominated all clothing until the mid-1960s, so a metal zipper is consistent with anything from the mid-1930s through the 1960s. Nylon coil zippers spread through the 1960s and became the standard in the 1970s, while molded plastic teeth existed from 1959 but stayed rare in fashion until later. The exceptions are jeans and heavy outerwear, which kept metal zippers for strength straight through to today, so a metal zipper in denim proves nothing. In dresses and skirts, a branded American metal zipper such as Talon or Conmar is a reliable pre-1965 signal.

Which vintage clothing is worth the most money?

Pre-1971 Levi’s denim, original band T-shirts, and documented designer pieces lead the market. Levi’s 501s with a Big E red tab sell from $300 into the thousands, and 1950s 501XX examples reach $8,000. Single-stitch 1980s concert tees bring $300 to $3,000, with rare tour shirts clearing five figures. Named couture from Dior, Chanel, and Halston sells in the low thousands when provenance holds up. Condition and size drive the final number, since larger sizes and unworn deadstock command premiums in every category. Check completed sales on WorthPoint rather than asking prices before you buy or sell.