A. Lange & Söhne. A Fine and Rare Platinum Perpetual Calendar Chronograph Wristwatch with Oversized Date Display, Leap Year Indicator, and Moon PhasesSigned A. Lange & Söhne, Glashütte I/SA, Datograph Perpetual, Ref. 410.025, Movement No. 48'202, Case No. 158'119, Circa 2008Cal. L952.1 mechanical movement, 45 jewels, finely hand-engraved balance cock, screwed gold chatons, silvered matte dial, applied Roman and baton numerals, luminous hands, outer raised tachometer scale, large double date aperture, two subsidiary dials for day combined with constant seconds and day/night indicator, and month combined with 30 minute register and leap year indicator, fan form sector for moon phases, circular case, button in the band for date change, two rectangular chronograph buttons in the band, sapphire crystal display back secured by six screws, platinum A. Lange & Söhne buckle, case, dial, and movement signed41mm diam.