3045. 3045Y Patek Philippe. A fine 18K gold automatic perpetual calendar wristwatch with moon phase Patek Philippe. A fine 18K (750) yellow gold automatic perpetual calendar wristwatch with moon phase. Model: Grand Complications Perpetual Calendar Reference: 5140J-001 Date: Purchased December 2009 Movement: 27-jewel Cal.240Q automatic, adjusted to heat, cold, isochronism and 5 positions, stamped with the Seal of Geneva, Gyromax balance, 22K gold micro-rotor, No.3679091 Dial: Silvered, applied 18K gold pointed baton hour markers, dot outer minute markers, subsidiary dials at 3, 6 and 9 indicating day combined with 24-hour display, month combined with leap year indication, and phases of the moon combined with date, gilt dagger hands Case: Brushed and polished round, solid snap on back, quick set buttons in the band at 6, 9 and 12, No.4707204 Strap/Bracelet: Black Patek Philippe alligator leather Buckle/Clasp: Signed 18K gold folding clasp Signed: Case, dial & movement Size: 37mm Weight: 73,65gr Accompaniments: Patek Philippe box, outer card, rotating watch support, adapter, Certificate of Origin, Instructions for use booklet, brochures, spare black alligator strap In 2006, Reference 5140 was introduced to the market as the successor to the discontinued and iconic 3940. The design of the 3940 was altered for the 5140 to make the case marginally bigger at 37mm and adapted the dial to have greater legibility. The overall look is refined and subtle, without compromising functionality.