Vintage Omega Square Tank, Art Deco Style, Black Dial, Roman numerals, Ref. 3813/1, Cal.R 17,8 from 1944Produced in 1944 during the height of WWII, this Omega Ref. 3813 1 reflects the brands focus on durability and reliability during uncertain times. Housed in a compact 28 x 26 mm stainless steel case, it runs on the hand wound Omega Caliber R 17,8trusted for its toughness and simplicity. CASE: Stainless steel case, 28 mm x 26 mm Lug to lug: 34. 5 mm Thickness: 7. 7 mm Slim and compact wrist presence MOVEMENT: Omega Caliber R 17,8, manual wind Serial