Re: Colt Revolver 36 cal.
Colt did make a dovetailed base with a German silver blade, but it is scarce on the 1851. Colt offers factory letters on some of their Percussion revolvers, and I THINK his model and sn are in the range of available letters. This letter would state the revolvers original configuration and destination, but also costs a couple of hundred dollars from Colt.
John Gross