It was quite common for gunmakers to borrow the name of better known gunsmiths of the time. W. Richards for Westley Richards, H. Derringer for Henry Deringer, etc. I suspect this is the case here. The ramrod is likly a period replacement, the broken lock can be fixed. I have an unmarked gun of similar quality--forestock checkering is a bit sloppy/crude, wood is plain, engraving is fairly minimal. I'd date it to about 1870 or so, maybe a bit earlier or later. It is basically a fancied up utility grade weapon, fairly common.