Details
CIRCA: 1955
CASE MATERIAL: 18k gold
CASE DIAMETER: 37mm
DIAL: Silvered
MOVEMENT: Manual
FUNCTIONS: Perpetual calendar with moon phase
CALIBER: 27 SC Q
ACCESSORIES: Extract from the Archives confirming manufacture date of 1955 and sale date of September 19, 1963

Please note this lot is the property of a private individual.
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Lot Essay

Patek Philippe introduced the reference 2438/1 in 1952 and it was in production until circa 1963. This model is the water resistant variation of its sister reference, the 2497, which features a screw-back and is .7mm smaller in diameter. The 2497 / 2438 was the world's first perpetual calendar wristwatch with center seconds. Based on the well-known and celebrated caliber 27SC, Patek Philippe upgraded it with a perpetual calendar mechanism underneath the dial and renamed it 27SC-QP, for perpetual calendar. Only 179 examples were made and were reserved exclusively for 2497, 2498, 2438-1, the screw back version. The movement range was reserved to go from 888'000 to 888'178. The present example is fresh to market and comes from a descendent of the original owner.

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