How to Date a Case Knife: Tang Stamps, Dots, and Pattern Numbers

Case dated its own knives on purpose, which is why a drawer of Case pocketknives can usually be sorted by decade in an afternoon. The catch is that the system changed several times in a century, collectors still argue about the early years, and Case has revived some of its oldest stamps on brand new knives. This guide follows W.R. Case & Sons Cutlery Co.’s own tang stamp and dot dating charts, read in October 2026, and says plainly where collectors disagree with them.

Where is the tang stamp on a Case knife?

Open the main blade. The tang is the base of the blade that sits inside the handle at the pivot, and when the blade is open it shows just above the metal end of the handle. Case strikes its name and date code there. The pattern number is struck on the tang of one blade too, often on the other side of the same tang and sometimes on a different blade, so open every blade on a multi-blade knife. Read stamps in daylight with your phone camera zoomed in. A worn or buffed stamp can be faint, and the details that date it are small.

Case tang stamps by era, 1905 to 1969

Treat every pre-1965 date as Case’s best estimate rather than a factory record. Collectors push the Tested XX and early CASE XX years a few years either way, and they read the rest of the knife, the shield, the bone and the construction, before they commit to a decade.

How do the dots date a Case knife?

In 1970 Case began what it calls dot dating. Each decade starts a new countdown, and each year one symbol is removed. The stamp around the dots tells you which decade you are counting in, so read the lettering first and count second.

The common mistake is counting dots without reading the stamp. Three dots is 1977 under the round-C stamp of the 1970s, 1987 under the lightning-S stamp of the 1980s, and 1997 under the long-tail C of the 1990s. And the 1990s countdown does not start at ten: Case returned to dots partway through 1993 with seven, which is why 1993 knives exist in two stamp styles.

Do fixed-blade Case knives follow the same dates?

Not in the 1970s. According to the Case Collectors Club charts, Case’s hunting and fixed-blade knives kept a plain CASE XX U.S.A. stamp with no dots from 1965 until 1980, so a dotless fixed blade can be from any year in that span. A folder with the same dotless stamp points to the late 1960s. Keep each hunting knife with its sheath when you photograph it.

How do you read a Case pattern number?

Case’s own rule is simple: the first number is the handle material, the second number is the number of blades, and the rest is the factory pattern. So 6254 is a jigged bone knife with two blades in pattern 54, the trapper, and 3254 is the same trapper with a smooth yellow handle. Letters after the number add detail: SS marks a stainless blade (Case has made stainless blades since 1916 and calls its stainless Tru-Sharp), and CV marks chrome vanadium, a high-carbon steel that darkens to a patina with age even when it is cared for.

Case’s list also has letter codes for ivory, exotic materials, metal and buffalo horn, and older knives may not match today’s meanings exactly. Two-character codes like 6.5 and 10 push the blade count one place to the right, so read them carefully. Some well-known patterns, with x standing for the handle digit: the trapper is x254, the mini trapper x207, the medium stockman x318, the large stockman x375, the canoe x2131, the peanut x220, the Sod Buster x138 and the medium Texas toothpick x1094. The Muskrat is the exception people trip on: it is stamped with the word MUSKRAT rather than a number.

Is the number on a Case knife a serial number?

No. People search for a Case serial number lookup, but the number on the tang is a pattern code that tells you the handle, the blade count and the pattern, not when or in what order the knife was made. The date is in the tang stamp: the lettering and the dots, X’s or year beside it.

What does XX mean on a Case knife?

It comes from Case’s heat treating. Case tells the story this way: when blades went into the hardening furnace, an X was marked on the pan that held them, and when they went back in for tempering a second X was added, so XX showed that each blade had been properly and fully treated. It became the Case trademark, which is why CASE XX appears on knives from the early 1900s to today. The XX itself dates nothing; the lettering and the marks around it do.

Why the stamp alone can mislead

• Case has struck old-looking names on new knives. The Case Collectors Club lists CASE BROS. CUTLERY CO. stamps on knives made in 2003 to 2007 and 2010, along with Kinfolks, Cattaraugus, Standard Knife, Crandall, Kane and other heritage names, so a Case Bros. stamp is not proof of an antique.
• Tested XX turns up on modern knives too. Auction catalogs describe Tested XX stamps on a 1990 Christmas knife, a 1994 pattern 61094 and a 1993 Case Brothers XX knife.
• Case Brothers was a separate family company in Little Valley, New York, whose factory burned in 1912. A genuine Case Brothers knife is a different and much older thing than a modern Case Bros. stamp.
• Counterfeits exist. Collectors confirm a stamp against the shield, the handle material, the jigging on bone and the construction, and a knife whose parts disagree with its stamp deserves a closer look before anyone pays for its age.

Which Case knives are worth the most?

Age, handle, pattern and condition together, with an unsharpened blade mattering most. At a February 2026 specialist sale a pre-1915 Case whittler made as a salesman’s sample brought $9,225, a Case Tested XX green bone whittler $4,674, and two 1940 to 1964 green bone cigar knives $3,936 each. Most Case knives sell for far less: auction medians between October 2024 and July 2026 ran from $22.50 to $105 a knife. Our Case knife value guide has the dated results and what moves them.

How do I get a Case knife collection dated and sold?

Lay the knives out and take one wide photo, then open a few blades and photograph the stamps and pattern numbers close up in daylight. Do not sharpen, buff or scrub anything first. Then call or text California Vintage Buyers at (949) 449-1255. We buy whole Case knife collections from every state: we go through the knives together on a video call, agree one price for all of them, and pay through PayPal before you ship, with shipping on us. In Southern California we come to you and pay cash the same visit. We buy collections, not single knives, and when Case is a real part of the collection we make one offer for everything, other makers included. If yours is not one we buy, our guide to selling a knife collection compares every other route honestly.