18kt rose gold case with a alligator brown leather strap. Opaline dial with gold-tone hands and Roman numeral hour markers. Dial Type: Analog. Around dial. Blancpain Calibre 6639 automatic movement with a 192-hour power reserve. Scratch resistant sapphire crystal. Pull / push crown. Skeleton transparent exhibition see through case back. Round case shape, case size: 42 mm, case thickness: 13.07 mm. Deployment with push button release clasp. Water resistant at 30 meters / 100 feet. Functions: month, date, day, hour, minute, second, moon phase. Additional Info: moonphase sub-dial. Luxury watch style. Watch label: Swiss Made. Item Variations: 6639 3642 55B, 6639.3642.55B, 6639364255B. Blancpain Villeret Complete Calendar 8 Days Men's Watch 6639-3642-55B.