Vostok Amphibian Military Russian Diver Watch Black 2416 / 420640 Imported Watch of official supplier of the Defense Department of the Soviet Union 200 m (660 feet) Water Resistant Automatic VOSTOK self-winding movement 2416B with 31 ruby jewels (no hands winding required, but watch can still be wound up with winding stem if it has not worn been worn for some time) Fully wound watches run at least 31 hours. Anti-shock (shock resistant) balance, Central second hand, Graduated rotated bezel Luminous hands and markings