Thanks for the replies, guys. Judging from the guide there it looks like mine must indeed be a 1954. I had set the brace height at 7" just to try the bow out, and it seemed to be fine there, but I just wanted to make sure it was ok. 67# is definitely on the heavy side, but it's in great shape (the bow, not me) and I got a good deal on it so I went for glory. You get a good workout in if nothing else! My normal hunting bow feels like a kids bow after shooting the Polar for awhile.