Hamilton H13519711 American Classic Boulton Mechanical 34mm x 38mmArt Deco meets American Classic style in the new Hamilton Boulton Mechanical. With its distinctive case shape, the Boulton has been a mainstay of the Hamilton collection since it first appeared in 1940. Reimagined for the twenty-first century and powered by the awesome H-50 handwinding movement, it proves that the Hamilton American Classic look never goes out of style. Featured in Superman: Legacy (2022) play by Wendell Pierce AMERICAN CLASSICA reflection of Hamilton's American roots, this collection offers versatility in a selection of 'wear anywhere' watches.STAINLESS STEEL CASEA highly resistant alloy composed of steel and chromium. It can be worked to resemble a precious metal. It is nearly impervious to rust, tarnish, and corrosion.SAPPHIRE CRYSTALSynthetic sapphire crystal is a tough scratch-resistant material, only diamonds could leave a mark.MANUAL WINDINGWind your mechanical watch by turning the crown clockwise.H-50 CALIBERAn exclusive caliber specifically developed for our handwinding watches, the H-50 has an extended power reserve of up to 80 hours.WATER RESISTANCEYour timepiece is resistant up to 5 bar (50m) / 73 psi (164 ft).