The Speedmaster Professional Replica is an authentic reproduction of the very first generation of the legendary Speedmaster. Typical of this 1957 model is its mat black dial applied OMEGA logo, luminous hands, arrow-tipped hour hand and satin-finished steel bezel with tachometric scale. Hand-winding mechanical chronograph, OMEGA calibre 1861 with circular-grained bottom plate, rhodium-plated finish, Geneva wave decor. Tachometric scale on outside ring, small continuous seconds, central chronograph hand, 30-minute and 12-hour totalizers, start-stop and return-to-zero push buttons, luminous dial, water-resistant case with screw-in back and stainless steel bracelet. 1/5 second display.