As far as I know the bow has no real collector value (I may be wrong though). I am not familiar with the company, but there were lots of shops that popped up and/or offshoots of other companies making bows back several years ago.

The 57" is the AMO bow length. The 45-28" means the bow is 45# of draw at 28" .

No idea what the actual value of the bow is--sorry.

Chad