18 carat red gold case with a brown alligator leather strap. Black cambered (slightly domed) enamel dial with leaf shaped hands and Roman numeral hour markers. Dial Type: Analog. Date display around the outer rim. Automatic movement. 6639 engine. Scratch resistant sapphire crystal. Pull / push crown. Skeleton transparent exhibition see through case back. Case diameter: 42 mm. Case thickness: 13.07 mm. Round case shape. Folding clasp. Water resistant at 30 meters / 100 feet. Functions: month, date, day, hour, minute, second, moon phase. Luxury watch style. Watch label: Swiss Made. Blancpain Villeret Complete Calendar 8 Days Black Dial Mens Watch 6639-3637-55B.