Rich I believe you are correct and I am placing to much emphasis on the walnut ... Probably confusing myself with various makers and models I have been researching... I am still hoping for some more info on particularly the first gun in the first link and the gun in the second link .....ie: was that fist one refinished ? And the small patch box seems to be an anomaly ....and the gun in the second link ....completely round scroll on the guard ....weird lock plate ....single pipe ...really worn or weird underlug ...... (or just a bad picture)
From what I've gathered from my meager selection of books on the subject and from what Mr. Stith and others have written here I can surmise the following.
1. The Hawken Brothers made custom rifles (like most makers in that era) and they became more standardized by the 1840s +/-.
2. There are at least a half dozen + different patchbox styles exhibited on extant models.
3. I've counted at least 4 very different types of lock, including recycled flintlocks converted to the Hawken bolster style, anything available was used.
4. Records show that .50-.54 were the normal bore sizes.
5. Fullstocks were cheaper than half stocks.
6. They also made shotguns and pistols. Would be nice if an original shotgun surfaced.