The action is an original No.1 action with a rebated octagonal top. The photo here doesn't show it, but there are light traces of original case color. The breech block has some sort of modification. The hammer has been "lightened" considerably with a lot of metal removed.
The double-set triggers functioned properly. I partially disassembled them to clean up old dried grease with Q-tips and solvent to see if I could find a gunmaker's name. Other than custom gunmakers (e.g. Carlos Gove and maybe Freund), Remington never made a double-set trigger for the Rolling Block rifle. They made a single-set trigger, but not double-set. A similar set of triggers by C. D. Ladd (San Francisco) is shown in Marcot's Rolling Block book.
The barrel is originally marked "44" (44 Long Rimfire) but has been relined to 22. The bore is mint. It may be a stainless barrel liner.
I am not exactly sure what I'll do with this rifle if anything.

Thoughts and opinions are appreciated ...