18K yellow gold case 37.0 mm in diameter. Transparrent exhibition case back. Silver dial with applied yellow gold luminiscent roman numerals. Center sweep seconds hand. Annual Calendar complication displaying the Day, Month, Date. Brown leather starp with 18K yellow gold tang buckle. Automatic movement. Functions: annual calendar; date, day, month. Gyromax balance, shock absorber, self-compensating free-sprung flat balance spring, 21K gold rotor, Geneva stamp. Patek box and papers. Excellent condition.