Jules Audemars 26390 Perpetual CalenderModel : Polished Stainless Steel Case, White Dial, Stick Markers on Leather Strap with Insignia Single folder over deployant Buckle Movement: Asian 2813 Automatic Movement With Calendar Complications, 23J, Rose Gold Rotor Functions: Hours, Minutes, Secs , Day, Date, Sun Moon Day Phase Month (Set Via 2.00 Pusher) and Date (Set via 4.00 Pusher), Day (Set Via 7.00 Recess Pusher) and Year (Set via 10.00 Recess Pusher), Day/Night Day Phase Subdial at 6,00 Note : Day, Date and Day/Night Phase / 24 Hour Indicator will advance Automatically with Time, Month and Year Needs Manual Adjustment Dimensions : Dia 41mm x 12.5mm Thk Material : 1 piece forged case construction, solid 316 stainless steel Back : Display Caseback with Detail Engraving Crown : One-piece Pull Out crown with o ring Crystal: Sapphire Crystal Water-resistant