A. Lange and Sohne 180.026FE Richard Lange Perpetual Calendar "TERRALUNA" 18K White Gold (33938)

33938 A. Lange & Sohne 180.026 Richard Lange Perpetual Calendar "Terraluna" 180026FE, 180.026, 180.026FE, 18k white gold case on a strap with an 18k white gold detachable deployant buckle, manual wind A. Lange & Sohne caliber L096.1, 336-hour power reserve (14 days) with a power reserve indicator at 6 o'clock, silver dial with regulator display, blued steel hands, black Roman numerals and railroad style tracks with red minute markers, big date, day, month, leap year, display back with orbital moonphase indicator showing the relative positions of the sun (the balance wheel) the moon and the earth with the 24 hour time zone divisions, sapphire crystal, diameter: 45.5mm, thickness: 16.5mm, Like new with original box and papers; which are undated. MSRP $231,500 USD.

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More about A. Lange and Sohne 180.026FE Richard Lange Perpetual Calendar "TERRALUNA" 18K White Gold

This is an 18K white gold A. Lange & Sohne Richard Lange Perpetual Calendar "Terraluna" 180.026FE. It has an alligator leather strap with an 18k white gold detachable deployment buckle, and scratch resistant sapphire crystals. It has a screw down signed winding crown, three correctors in line at 9 o'clock on the left-side case band for the perpetual calendar, and there is a fourth corrector at 4 o'clock on the right-side case band. It includes an exhibition sapphire display case back secured with 6 screws engraved with "A. LANGE & SOHNE - GLASHUTTE S.A." hallmarks, and a serial number. The 45.5mm diameter solid three-body case, curved lugs, and convex bezel, are satin/brushed. The silver dial has three overlapping circles including a large off-center dial at 12 o'clock for the Richard Lange jumping constant running small seconds with a black railway-style minute scale with red Arabic numerals at the quarter--minutes, and a blued steel sword indicator hand. There is a circular hour dial with black Roman numerals and a blued steel sword hand, and a month aperture window at its 3 o'clock position. A minute subsidiary dial of the same size as the hours with a black railway-style second ring and black Arabic numerals every ten minutes is entwined with the hours dial, with a blued steel sword indicator hand with a diamond-shaped skeletonized counterbalance. There is an arched aperture opening for the power reserve at 6 o'clock with an applied fixed arrow-shaped white gold pointer; it tells the owner when to refresh the movement with the winding crown. A white gold-framed grand date aperture window is at 12 o'clock. There is an orbital moon phase indicator exhibiting the relative positions of the sun (in an open-worked balance wheel), the moon, and the earth with a grey outer reserve with engraved 24-hour time zone divisions exhibiting a time-of-day reference for regions in the northern hemisphere. The moon orbits the earth in an anti-clockwise movement, with the planetary wheel train always correctly displaying the moon. The mechanism is so accurate that a correction by one day is only required once every 1058 years. It has a 336-hour power reserve at full winding, it's water resistant to 30 meters/100 feet, and the 16.5mm thick case, dial, and movement are all signed.

This A. Lange & Sohne Richard Lange Perpetual Calendar "Terraluna" 180.026FE has a mechanical manual winding A. Lange & Sohne caliber L096.1 movement. It's rhodium plated with Cotes de Geneve embellishment, and it's constructed with 80 jewels, 786 components, a constant force escapement, and 2 screwed gold chatons. It includes a twin mainspring barrel, blued screws, a shock absorber mechanism, and a screw balance beat adjustment system. The mechanism oscillates at a frequency of 21,600 vph (3 Hz).

The A. Lange & Sohne Richard Lange Perpetual Calendar "Terraluna" 180.026FE was introduced in 2014.