Looking at the picture I would say that it was a original Alaskan which mean it was made in Grayling Michigan, before Bear move down to Florida.

The Alaskan was Bear top of the line bow back in the late 70’s. The let off is 45 or 50 percent on this bow. The draw weight adjustment is 10 pounds so if the bow is mark at 50 pound the adjustment go’s from 40 to 50 pounds. The draw length was dictated the wheel but you can make some adjustment to the cables on the riser.
I hope this helps.