A RARE AND FINE WHITE GOLD AUTOMATIC PERPETUAL CALENDAR WRISTWATCH WITH MOON PHASES, BRACELET AND WATER-RESISTANT TYPE SCREW-DOWN CASE BACK, Patek Philippe & Co., Genève, NO. 3126119, REF. 5136/1, CIRCA 2000

18k, rhodium plated lever movement (Cal. 240 Q) stamped with the seal of Geneva, 27 jewels, gyromax balance, adjusted to heat, cold, isochronism and 5 positions, 22k gold mini-rotor, silvered matte dial with applied white gold faceted baton numerals, outer minute ring with applied discs, three subsidiary sunk dials indicating day combined with 24-hour display at 9, month with leap year cycle at 3 and aperture for moon phases combined with date ring at 6, white gold Dauphine hands, polished circular case with down-turned lugs, water-resistant type screw-down sapphire crystal display back to admire the movement, case, dial and movement signed, with an 18k white gold Patek Philippe 5-row bracelet and double deployant clasp.

The accompanied Extract from the Patek Philippe Archives confirms this watch was manufactured in 2000 and its subsequent sale on 6th March 2003.

Different from the similar model reference 3940, the reference 5136/1 is fitted with bracelet and water-resistant type screw-down case back. At the same time, the reference 5136/1 is only available in yellow gold or white gold. It is also interesting to note that the perpetual calendar of this watch will run without adjustment until 28th February 2100, because the Gregorian calendar does not include 29th February in that year.