A. LANGE AND SOHNE, A FINE PLATINUM AUTOMATIC PERPETUAL CALENDAR WRISTWATCH WITH MOON PHASES AND OVERSIZED DATE LANGEMATIK PERPETUAL, CIRCA 2002

three-quarter plate nickel lever movement (Calibre 310.025E), 43 jewels, glucydur balance with weighted screws, swan-neck fine adjustment, 21k gold and platinum rotor, silver matte dial, applied Roman numerals, luminous hands, twin apertures for oversized date,  3 guilloche subsidiary dials indicating day with 24 hours day/night indication, month with smaller dial for leap year, seconds with moon phases, push button at 10 for quick date adjustment, sapphire crystal back secured by 6 screws, case, dial and movement signed, with a platinum Lange deployant clasp.

Accompanied by an A. Lange and Sohne presentation box, certificate and setting pin. 

A. Lange & Sohne stopped manufacturing the ‘Langematik Perpetual’ with push button in the beginning of 2006.  The push button is replaced by pin-set device in the new version.