Case material: White gold; Charge: Automatic; Conditions: Used Presentation condition : Without documents; Model: calendar perpetual Price on request Gmtbroker Reference: 5136G/1G Pristine preowned mens Patek Philippe complication in solid 18k white gold features: Month, Day, Date, AM/PM Indicator, Moon Phase, and Leap Year Indicator. An amazing complication. Comes with its box as shown(archival document can be ordered on request).