Live Auction 2869Important Watches
A. LANGE & SOHNE. A VERY FINE AND RARE PLATINUM AUTOMATIC PERPETUAL CALENDAR WRISTWATCH WITH MOON PHASES, LEAP YEAR INDICATION, OVERSIZED DATE AND ZERO-RESET FUNCTION
Lot 3748

A. LANGE & SOHNE. A VERY FINE AND RARE PLATINUM AUTOMATIC PERPETUAL CALENDAR WRISTWATCH WITH MOON PHASES, LEAP YEAR INDICATION, OVERSIZED DATE AND ZERO-RESET FUNCTION

SIGNED A. LANGE & SOHNE, GLASHUTTE I/SA, SAX-O-MAT, LANGEMATIK PERPETUAL MODEL, REF. 301.025, MOVEMENT NO. 28'273, CASE NUMBER 146'743, CIRCA 2004

Closed30 November 2011

Price Realised

HKD 312,500

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A. LANGE & SOHNE. A VERY FINE AND RARE PLATINUM AUTOMATIC PERPETUAL CALENDAR WRISTWATCH WITH MOON PHASES, LEAP YEAR INDICATION, OVERSIZED DATE AND ZERO-RESET FUNCTION
SIGNED A. LANGE & SOHNE, GLASHUTTE I/SA, SAX-O-MAT, LANGEMATIK PERPETUAL MODEL, REF. 301.025, MOVEMENT NO. 28'273, CASE NUMBER 146'743, CIRCA 2004
Cal. L922.1 untreated German silver lever movement, 43 jewels, finely hand-engraved balance bridge, swan neck regulator, 21K gold micro-rotor with platinum rim, silvered dial, applied Roman numerals with luminous dots, luminous hands, outer railway minute divisions, large double window for date, three subsidiary dials for week and 24 hour display, month and leap year, constant seconds and moon phases, large circular case, calendar change button in the band, glazed display back secured by six screws, platinum A. Lange & Söhne buckle, case, dial and movement signed
38.5 mm. diam.

Specialist note

US$30,000-50,000

With A. Lange & Söhne undated International Guarantee, setting pin and product literature.

The Langematik Perpetual is the world's first automatic wristwatch featuring a perpetual calendar, an oversized date and the patented zero reset mechanism allowing the calendar displays as well as the moon phase indication to be advanced either individually or collectively by depressing the calendar change button in the band.

Once correctly set, the date display remains accurate until the next secular year occurs: On 28 February 2100, it will need to be advanced by only one day. The moon phase mechanism is also stunningly accurate: after 122.6 years of uninterrupted operation, it deviates from synodic lunation by merely one day.

Lange's patented "zero-reset" mechanism simplifies the synchronization of the watch with a time signal. When the crown is pulled out, it automatically causes the seconds hand to jump to the 12 o'clock or "zero" position.