Offered here is a variation of Merwin, Hulbert & Co's medium frame double action revolver manufactured exclusively by Hopkins & Allen in the 1880s. These revolver were chambered in .32 or .38 caliber with total production estimated at a few thousand. The left side of the frame is marked "38 CAL," and the rib has the two-line Merwin, Hulbert & Co. address/patent dates marking. "529" is on the folding hammer spur, the serial number is on the butt, rear cylinder face and barrel lug, and the assembly number "4779" is on the left side of the grip frame and right grip panel. Comes with a correct period box.