Manufactured from 1876 to the 1880's by Hopkins & Allen, these revolvers show the superior quality and ingenuity that Merwin, Hulbert & Co. revolvers have come to be known for. The two-line Hopkins & Allen address and patent markings are on the left side of the barrel and the left side of the frame is marked "CALIBRE/WINCHESTER" and "1873". The serial number is on the right side of the bird's head grip, which has a hole for a lanyard ring. The left side of the grip frame under the grip is marked with the assembly number "405", which is repeated on the barrel lug and rear cylinder face. It is fitted with blade and notch sights and a pair of checkered hard rubber grips.