Marc -
The characteristics of your possible Bear Kodiak Special marked EXP#6, AMO-68”, 34#, are a bit of a conundrum.
The only characteristic you mention identifying the bow as a Bear bow, is the Bear Sight. Keep in mind the riser of any bow by any bowyer could have been routed out to accept this Bear sight.
The style of the lettering inscribed on the bow does not match the lettering on any Bear I remember seeing from the 1960s.
Although significantly different, the riser shape of your bow probably most closely matches the production 1966 Kodiak Special, which was made in 66” and 69” that year. Your bow is marked AMO-68”, a length the Bear Kodiak Special was not offered in the Bear catalog after 1960.
1967 was the last year the Kodiak Special was produced & offered in the Bear catalog.
However, 1968 is the first year that “AMO” appears on any of the Bear Bows that I have owned.
Why would 1968 AMO lettering appear on a possible 1966 type bow that was discontinued in 1967 and never made in 68” length after 1960?
Any possible explanation for this conundrum, would likely require considerable speculation.