Only 2,100 Richards-Mason conversions were completed around 1877-1878. These revolvers were manufactured by assembling partially finished Model 1860 Army percussion revolver parts. This revolver falls in the correct serial number range of 5800-7900 for this style of conversion. It correctly has a breech plate without rear sight and a notch for the hammer to strike the centerfire cartridge, modified percussion barrel with smaller lug than the previous Richards conversion, and no rim on the conversion plate like the Richards conversions. It has a the one line Hartford barrel address, blade and hammer notch sights, the 1871 and 1872 patent dates on the left side of the frame, "44 CAL" on the trigger guard, and the naval battle scene on the cylinder. Matching numbers are present on the barrel, frame, cylinder, trigger guard, and back strap. The loading gate is marked "1074".

Exceptionally fine, retains 50% plus of the bright original high polish blue finish, 85% plus of the vibrant original case colors, and 95% plus of the original silver with the balance having thinned to mostly a smooth grey patina and a few small patches of light surface pitting. The grip is excellentwith some scattered light handling marks and retaining almost all of the varnish. Mechanically excellent.