Pocket watch: extremely unusual American hunting case watch with special winding according to patent from 1852, Ankerchronometer No.38731: Ca. Ø55mm, ca. 138g, silver case, hunting case watch, case and movement with matching numbers, extremely unusual dome with holder for the special key for the winding patent, inscribed Patent registered Oct.1852, made expressly to order for James Sanders, Schenectady NY, under the dome is a very fine Swiss Ankerchronometer movement with special lever, signed enamel dial, blued steel hands, in working order, very interesting collector's watch, which also comes with a very solid silver watch chain.