You insist on patina for anything that goes in your collection--me too--this Warrick County, Indiana, creek-found Cobbs Knife will fill that requirement. My caliper sits on 4&3/16" by 1&3/4"--slightly over 3/8" max thickness--REALLY proportional. If I'm to point out anything, it's the long flakes that form the blade edges--they travel to--and past--the medial ridge. That chipping technique is very similar to what Paleo knappers used--Outre Pas chipping. Cobbs Knives are generally considered as Early Archaic Culture, but this piece shows an even earlier knapping technique than was "Early Archaic standard". Was there some ancient damage to one blade edge; yes. Too, was the tip used as a drill (or burin)--again, yes. Tools that were used show wear. Period. The finder is no longer living, but I'd sure like to know if the creek source of this knife was right behind his country home. I'll pass along all the provenance I received with the piece to the next owner. Shipping is $8.00. checks or M.O.s are welcomed--sorry, I do not use paypal-type payments--Roy A.