18kt red gold case with a brown alligator leather strap. Fixed 18kt red gold bezel. Black cambered (slightly domed) enamel dial with leaf shaped red gold hands and Roman numeral hour markers. Date scale around the outer rim. Dial Type: Analog. Luminescent hands. Day odf the week and month display below the 12 o'clock positions. Seconds and moonphase sub-dial at the 6 o'clock position. Automatic movement with a 192 hour power reserve. Scratch resistant sapphire crystal. Pull / push crown. Skeleton case back. Case diameter: 42 mm. Case thickness: 13.07 mm. Round case shape. Band width: 20.3 mm. Band length: 8 inches. 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. Item Variations: 6639 3637 55B, 6639.3637.55B, 6639363755B. Blancpain Villeret Complete Calendar 8 Days Black Dial Brown Leather Mens Watch 6639-3637-55B.