Marked on box "Marble's Flexible Rear Sight No. W1. For Winchester Repeater, Model 1894 and 55. Calibers 25-35 and 32 Special". I know this will fit on other Winchesters as I bought it for my Wichester model 1890 ( which it fit perfectly). Comes with original box and advertisement paper. Two corners of box are torn. Sight is marked "Marble" Gladstone, Mich." on one side and "May Oct.20-03,Nov.14-05" on the other. Aperature measures aprox. .050". One thin 1/4" scratch on top. No rust or other blemish. In 99% original condition.