Hawken rifles were not "cookie cutter" duplicates of each other, and their rifle designs evolved some over time, but I don't think that one was built by the Hawken shop. there are just too many discrepancies in comparison with known Hawkens. Somebody did go to the trouble of acquiring
S. HAWKEN and
ST. LOUIS stamps, as the letters don't appear to be individually stamped, but spuriously stamped rifles are out there, and as noted by
@Rifleman1776 at least one genuine original Hawken stamp is still known to exist. I do believe the rifle is a genuine antique, but I don't think it was shot much in its current configuration. Old-time percussion caps were very corrosive, and there is very minimal erosion at the breech or on the drum. The barrel could have been cut at the breech and moved back, but if that was done, I don't think it was shot much afterward. I suppose the rifle might have been worked over in the Hawken shop, but it is my understanding that Sam did not put his stamp on anything that he did not at least have a hand in making.
There are knowledgeable collectors out there who scour the web for auctions like this, but here we have a Hawken rifle with a starting price of $5,000 and no bids. I think that tells us something.
I think it is a genuine antique with some anomalous features, but I don't think it's a Hawken.
Notchy Bob