All About Pocket Knives

I recently snagged this Kutmaster Muskrat and have been trying to find out, with no luck, what the zero "O" in the lower right corner of the tang stamp signifies. Both blades have the same stamp. Maybe delrin scales or carbon steel blades? Any info would be appreciated. It may not mean anything, but it's bugging me not knowing why it's there.

A couple of other folks have asked this same question previously. There’s a few ideas posted but nothing definite. Take a look at this thread viewtopic.php?t=33956
Jeff

I have the same knife, but mine is not marked with the "O" on the tang stamp. That is kind of a curious thing. Mine is blade etched "Blake & Lamb". It may be a way to date the different tang stamps if it could be determined when they were produced.

Jeff, thanks for pointing out that thread. I didn't see any answers to my question, but I did find out that other people are wondering the same thing!