IWC Schaffhausen yellow gold pocket watch, marked 18ct, with Arabic numerals & a sub dial, all encased in an octagonal case, has the French 18ct mark & is marked in a shield 18k, the inner casing to the movement is marked International Watch Company and the metal (gold fill) is the same mark on the movement. the movement has the circular punch type IWC mark & the serial number (which is too small to photograph) together with a yellow gold fob chain weighting 75 gms approx.