What's in a name, you ask? Well...... The long version of Western and their stamps would make for a small book.
First caveat - Most of what I relate here is for FIXED BLADE knives.
Folders have their own set of stamps and I have not made a study of them since I don't collect them. The stamps depicted in TKMWWW and subsequent collections of stamps are both correct and incorrect. Some were used on fixed blades only. Others on folders only. Some on both at the same time and others on both at different times.
The company started out as WESTERN STATES CUTLERY & MANUFACTURING CO. The Platts family had moved to Boulder CO in 1911 and immediately started selling cutlery out of their home. Their initial products were made by others, mostly by W.R. Case (as payment for the shares of Case stock that Platts had sold back to W.R.), but also by Marbles, Union (Kabar), and maybe others . The stamps varied, but most had some version of WESTERN STATES CUTLERY as the stamp. This was the official company name until 1956, when STATES was dropped and it became simply WESTERN CUTLERY CO.
During this period (1912 to 1956), stamps used included --
WESTERN STATES CUTLERY CO.,
WESTERN STATES CUT CO,
WESTERN,
WEST-CUT,
WESTACO
and probably others. All of them had BOULDER COLO as part of the stamp. After 1931, MOST Western fixed blades had some reference to the bifurcated tang patent number. These included
PAT APPL'D FOR (1931-1932)
PATENT PEND (1933-1934)
and then from 1934 to about 1950 to 1952ish, (depending on model #)
PATENTED
PAT. NO. 1,967,479
PAT. MADE IN USA (1946/7 - 1953 or 1954, depending on model)
Model numbers were "officially added" to the stamps around 1955, but I have knives with both a model number AND a reference to the patent #. Theoretically, based on what TKMWWW has, the stamp on fixeds between 1950 and 1955 SHOULD have been WESTERN over BOULDER COLO, but......
After 1956, the stamps were essentially
WESTERN over BOULDER COLO with "additions"
From 1955 to 1967, the model numbers were on the pile side ricasso
Starting in 1968, the model numbers were on the guard.
In 1970, the WESTMARK line was added. These were the 701, 702 and 703. Any WESTMARKs other than these 3 were made for Smokie Mountain Knife Works, most likely by Camillus.
BOULDER COLO was dropped from all stamps starting in 1973.
Western started adding date codes to the stamps in 1977, starting with "A". "G" and "O" are the 2 rarest stamps. "G" because that presaged the sale of Western to Coleman. "O" were the final offerings before Camillus bought the assets.
After Camillus bought the name in 1992, the date codes were dropped and the stamps changed to
WESTERN
over
USA Model#
Then you can also throw in the contract knives, stamped for other vendors --
Western Field (Montgomery Wards)
Coast Cutlery (Oregon)
Hawthorne (Montgomery Wards)
Ranger (Unknown)
J.C. Higgins (Sears)
Western Auto
There's more specific details, re: W49/Bowies, but that info is in my W49 ID thread.