Case material: Steel; Charge: Automatic; Conditions: Never worn Year : 1980; Presentation condition : With dealer guarantee ; Model: Da Vinci Perpetual Calendar Price on request Gmtbroker Reference: TIW3585M Pre owned, mint condition, FULL SET, IWC Da Vinci 3750, 39mm Black Zirconium Oxide case with yellow gold crown, white dial with hour markers, moonphase, chronograph, perpetual calendar, 18K yellow solid back, plexiglass, 30m water resistant. Original Box and Original Service Papers. This watch carries a TM 12 month mechanical warranty, alongside any remaining manufacturer's warranty it may also have.