18k yellow gold open face chronograph pocket watch by Longines, 54mm diameter, serial number 230128. 18k yellow gold hinged back case and curvette. Case back is engine turned with a center circle containing intertwined initials which appear to be A, E & M. Clean porcelain dial with black Roman numerals, minute ring with Arabic five minute markers, subsidiary constant seconds register and subsidiary 30 minute chronograph register with sweep chronograph hand. Quality pin set chronograph movement by Longines in good working condition.