This watch is a reissue of a watch produced in 1963 for the Air Force of the People's Republic of China. This 1963 Seagull is a mechanical manual winding model with a khaki / olive-coloured NATO strap and another brown leather strap. Tianjin Sea Gull Watch Manufacturing Group is the largest Chinese watch company. Founded in 1955 in Tianjin, it is currently the manufacturer that produces the majority of mechanical watches in the world. There is little information on the brand but there are many models and mechanisms for sale on different websites. Case diameter: 38 mm, calibre 40 mm 21 jewels. 18 mm wide strap, NATO Another genuine leather bracelet comes in the box. Charge: 40h The watch is new and was never worn. Shipping will be fast and careful.