.Automatic VOSTOK self-winding movement 2416B, 31 ruby jewels.........VOSTOK it is a russian trade mark. Vostok Watch Makers, Inc. produces rugged military-style and diver's watches at its factory in Tatarstan, Chistopol city, Russia....... Vostok now is a leader of the Russian watch industry. Vostok factory had been an official supplier for the Ministry of Defense of the USSR (now Russia). Vostok is the official supplier of Russian Army now as well. F= 19800 A/h. Power reserve 40 hours.