old millie question

Joined
Feb 1, 2004
Messages
186
Hi all , I picked up an old military today. It has ats-34 blade steel , black blade with engraved spyderco lettering, 2 screw clip. Does anyone know when spyderco started using the concentric pivot that made adjustment
of the liner lock possible. From what I can see on mine it's pivot is D shaped allowing no turning at all . Thanks , Andy.
 
yes thank you , eccentric. Fortunate for me most readers will be able to understand my question
regardless of my error
 
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