German. Platinum. A. Lange & Sohne is arguably the most prestigious watchmaker outside of Switzerland. Based in Glashutte, Germany; total annual production is limited to just 5000-6000 pieces. The Langematik Perpetual Calendar, Ref. 310.025, was introduced in 2001 and represents a landmark in Saxon watchmaking, as the brand's first perpetual calendar. It was also the world's first automatic wristwatch to combine a perpetual calendar with the signature A. Lange & Sohne outsize date and a zero-reset mechanism. Housed in a 950 platinum case, this watch features a solid silver, rhodium-plated dial with applied Roman numeral markers. The sophisticated layout includes a day/night indicator at 9 o'clock, a leap year display at 3 o'clock, and a moon phase integrated with subsidiary seconds at 6 o'clock. Driven by the Caliber L922.1 SAX-0-MAT, the movement is finished to an exquisite standard, featuring a 21-carat gold micro-rotor and a hand-engraved balance cock. This watch, with SN 146739, is on the original black crocodile strap from A. Lange & Sohne and includes boxes per the photographs. Also included is a premium aftermarket crocodile strap. A truly rare and magnificent timepiece! Offered subject to reserve. Marked, "SN 146739" and "Movement 28424". 38.5 mm. German. A. Lange & Sohne is arguably the most prestigious watchmaker outside of Switzerland. Based in Glashutte, Germany; total annual production is limited to just 5000-6000 pieces. The Langematik Perpetual Calendar, Ref. 310.025, was introduced in 2001 and represents a landmark in Saxon watchmaking, as the brand's first perpetual calendar. It was also the world's first automatic wristwatch to combine a perpetual calendar with the signature A. Lange & Sohne outsize date and a zero-reset mechanism. Housed in a 950 platinum case, this watch features a solid silver, rhodium-plated dial with applied Roman numeral markers. The sophisticated layout includes a day/night indicator at 9 o'clock, a leap year display at 3 o'clock, and a moon phase integrated with subsidiary seconds at 6 o'clock. Driven by the Caliber L922.1 SAX-0-MAT, the movement is finished to an exquisite standard, featuring a 21-carat gold micro-rotor and a hand-engraved balance cock. This watch, with SN 146739, is on the original black crocodile strap from A. Lange & Sohne and includes boxes per the photographs. Also included is a premium aftermarket crocodile strap. A truly rare and magnificent timepiece! Offered subject to reserve. Marked, "SN 146739" and "Movement 28424".

Light evidence of gentle use. The watch was observed to be running at the time of cataloguing. It has not been tested for timekeeping accuracy and may require adjustment.