International Watch Co. (IWC), Portofino Perpetual Calendar, ref. 3541, an 18 carat gold wrist watch, no. 2461498, circa 1990, automatic movement, 36 jewels, cal. 37562, adjusted to 5 positions, white dial, applied baton markers, pointed baton hands, centre seconds hand, subsidiary dials for moonphase, day, date and month, year aperture between 7 and 8 o'clock, screw down crown, screw down case back, stamped with 18 carat gold common control mark, on an unsigned leather strap with an IWC 18 carat gold pin buckle, case back, dial, movement, crown and buckle signed, diameter 35mm