Patek Philippe Perpetual Calendar 2497

PATEK PHILIPPE. AN EXTREMELY RARE AND ELEGANT 18K GOLD PERPETUAL CALENDAR WRISTWATCH WITH SWEEP CENTRE SECONDS AND MOON PHASES SIGNED PATEK PHILIPPE, REF. 2497, MOVEMENT NO. 888'021, CASE NO. 674'380, CIRCA 1956 Movement: Manual Dial: Silvered Case: 37 mm. diam. With: 18k gold Patek Philippe buckle Remark: Approx. 90 pieces made in yellow gold, first series with Vichet case