Finding one in the original box complete with matching numbered components is where they get expensive. Are the parts numbered? Are they the same number? If I remember correctly, the action is numbered, the bolt is numbered, the magazines are numbered, and the floor plate is numbered. That does not look like an original box but I will let others chime in on that. There is a little tool that appears to be missing. Would like to find out what others think.
Case appears incorrect. Doesn't have slot for tool and hinges are incorrect. Also, the routing for the parts to sit recessed into the case looks pretty sloppy.
I attached two Erma conversion units that were previously sold at Rock Island Auctions.