A VERY FINE PLATINUM AUTOMATIC PERPETUAL CALENDAR WRISTWATCH WITH OVERSIZED DATE AND MOON PHASES, A. Lange & Söhne, Glashütte, 'LANGEMATIK PERPETUAL', NO.28463, 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 mini rotor, silver matte dial with applied white gold Roman numerals, luminous hands, twin apertures for the oversized date at 12, 3 guilloche subsidiary dials for day combined with 24-hours day/night indication, month combined with smaller dial for leap year, seconds combined with moon phases, push button on the band for adjusting date, sapphire crystal display back secured by 6 screws, case, dial and movement signed, with a platinum A. Lange & Sohne buckle.

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.