Vostok Komandirskie Mechanical AUTO Self-Winding Mens Military Commander Wrist Watch #641641 Watch of official supplier of the Defense Department of the Soviet Union 30 m (3 Bar) Water Resistant Dimensions: approx. 39mm x 39mm, lug size - 20mm Movement: Vostok 2416B with 31 ruby jewels; Power Reserve - 31 hour Calendar type - Date