Important Collectors’ Wristwatches, P...

New York, The Grand Havana Room, Sep 20, 2006

LOT 313

"Platinum Langematik Perpetual" A. Lange & Söhne, Glashütte i. Sa., "Sax - O - Mat", Ref. 310.025. Very fine and rare, astronomic, self-winding, platinum gentleman's wristwatch with perpetual calendar, moon phases, large date, leap year indication, 24 hour-display and an 18K white gold A. Lange & Söhne deployant clasp.

USD 43,000 - 53,000

EUR 34,000 - 42,000

Sold: USD 51,920

C. Three-body, solid, polished and brushed, rounded bezel, transparent case back with 6 screws, push button on the band to correct the date, sapphire crystals. D. Satiné solid silver with applied white gold Roman numerals, subsidiary dials for the days of the week, the months, the leap year, the 24 hours with day/night indication and the seconds, apertures for the large date at 12 and the moon phases at 6. White gold luminous "alpha" hands. M. Cal. L922.1 ("Sax-O-Mat" with zero-reset feature), maillechort, "fausses-côtes" decoration, 43 jewels, straight line lever escapement, monometallic balance adjusted to 5 positions, shock-absorber, self-compensating flat balancespring, "swan-neck" micrometer regulator, 21K gold micro-rotor with platinum segment, hand engraved balance bridge. Dial, case and movement signed. Diam. 38 mm. Thickness: 10 mm.


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Grading System
Grade: AAA

Excellent
Case: 2

Very good
Movement: 1

As new
Dial: 1-01

As new

HANDS Original

Notes

Sax - O - Mat, Ref. 310.025 Production of this reference started in 2001. What is a Perpetual Calendar? A perpetual calendar is a calendar mechanism which, unlike a simple calendar, automatically adjusts to the correct day of the month by accounting for the varying durations of each month, as well as self-correcting for the 29th of February during leap years. Audemars Piguet are said to have been the first to produce wristwatches with perpetual calendar and moon phases, in 1924. In 1925, Patek Philippe modified a lady?s pendant watch with perpetual calendar to produce the world?s first instantaneous changing perpetual calendar wristwatch with leap year indication.