Atlantic Worldmaster Original Type: Men's Antishock system: Antichoc Movement: Hand-wound, Swiss Made, 21 Jewels, Unitas 6300(N) Case type: Chrome Dial colour: Silver Crystal: Acrylic glass. Strap type: Leather Strap colour: Black, 20 mm Case width without the crown: 37 mm Case thickness: 11 mm This watch is from the 1970s. The watch is powered by an extremely durable Swiss Unitas 6300(N) movement on 21 jewels. It shows time well. Chrome case. Steel screw-down case back, signed. Sharp crown. The watch has a black leather strap—20 mm (length: 240 mm). Please have a look at the photos which are part of the description. I am selling the watch without its box. The watch will be professionally packaged and dispatched with a tracking number.