Jaquet Droz J3 Reserve de Marche Ceramique, Limited Edition to 8 Pieces, Ceramic Case on a Strap with a Ceramic Deployant Buckle, Automatic Movement (Caliber 4063D), Black Grand Feu Enameled Dial, Power Reserve Indicator in Red, 68 Hours Power Reserve, Case Diameter: 44mm, Thickness: 13mm, Sapphire Crystal, Water Resistant to 30 Meters, Like New with Original Box and Papers.