I know what they are. It's more complicated than just 4 pin. It's the location of the brass and steel pins, and the pattern. Mine is a 4 dot 3 pin. Which came before the 4 pin.
No.
BOTH the two dotters and the three dotters had four pins (three rivets and one pivot pin).....and BOTH came BEFORE the FOUR DOTTERS so your knife is an anomaly.....likely somebody put a newer blade on and older 110 frame.
Actually, the likely answer is not complicated. Your knife must have been slapped together from parts by a knife mangler.
Got a picture of that strange knife?
The Tea Party Movement is pretty much the same as a bowel movement except that it smells worse and has far less in the way of intelligent content. --DancesWithGuns
