IWC man pocket watch designates "cross-country watch Co. " with separate second and on the back monogram "TR" at fob chain. 1. Half 20th century back cover and dust cover 585er RG, used. Gold fineness hallmark, Switzerland. IWC, used. Model number 379653. Diameter approximate 5, 0 cm. Approximate. 113, 90 large movement unaudited.