Looks like a Mk I. The only dating clues I know are that the black blades were introduced in, and that original blade length (5") was. Hi, I just got a Gerber Mark I on ebay serial # Click here to enter the drawing for your chance to win a Cold Steel Knives Tuff Lite. Production Date Information For Gerber Mark II™ Knives.
They are true Gerber products but the prices should be adjusted accordingly on them as they were not made in the above serial number years. Black handle Mark II's started around Roughly https://allworld-dating.site/cats16/2137.php the orange handle Mk II "Dive" knives were made Serial number xx - xx from to In Gerber introduced "Armorhide" handles.
Serrations came out in lateearly L6 tool steel was used for the blade up to aboutthen Gerber switched to Stainless.