I, too, would like to see the tang stamp on the Co-Op knives be different than the CSC Ellenville knives, rather than just have the paper information slip supplied with the knives note the difference. And, as mentioned above, I really like the idea of having the cutler for each knife identified in some way.
I'm not very knowledgeable about the methodology of folding knife manufacture. I assume 1) that the metal parts (blade, backspring, spacers, etc) are cast, forged, machine cut, and/or tempered as required in small batches; 2) handles of various materials are formed by a combination of machine and handwork to obtain the finished size and shape from blanks of the wood, bone, synthetic, etc; and 3) a skilled cutler then uses hand tools to finish and assemble the complete knife from the various parts.
When are the tang stamps punched into the blades? From pictures I've previously seen of the CSC manufacturing process, the stamps were in the blades before the blades were finished and assembled into a knife.
Is it possible that the blades (and other metal parts) for these early Co-Op knives are left-over stock from CSC Ellenville and that is why they have the CSC tang stamp? Or maybe Mr. Gardiner just doesn't have the money right now to create a new tang stamp die to use on the new blade blanks? I am still wondering why all of the Co-Op pinch blades are 154 CM and not D2, like the CSC knives. That difference in metallurgy seems to indicate the blades are new, and not old, left-over stock.
If my assumption about manufacture above is anywhere close to correct, perhaps the individual cutlers that are part of the Co-Op receive the finished and semi-finished pieces of the knives from Mr. Gardiner and then finish and assemble each knife on their own. They blades are stamped when the cutlers receive them. This might also explain why a few of the Pinches have only two pins on the heel end and others have 3. (Note the picture of the newly shown flannel micarta Pinch on the RHC web-site only shows 2 pins.) Different cutlers may decide on how many pins are required to adequately attach the handle.
Just guessing...and wondering...and enjoying well manufactured knives....