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A. Lange & Söhne. A very fine and rare limited edition set comprising one 18K white gold and one 18K pink gold twin barrel wristwatch with oversized date, power reserve, moon phases display of the Southern and Northern Hemispheres

SIGNED A. LANGE & SÖHNE, GRAND LANGE 1 "LUNA MUNDI" MODELS, LIMITED EDITION NO. 41/101, MOVEMENT NOS. 39'013 AND 39'153, CASE NOS. 152'541 AND 152'341, MANUFACTURED IN 2003

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A. Lange & Söhne. A very fine and rare limited edition set comprising one 18K white gold and one 18K pink gold twin barrel wristwatch with oversized date, power reserve, moon phases display of the Southern and Northern Hemispheres
Signed A. Lange & Söhne, GRAND LANGE 1 "Luna Mundi" models, Limited Edition No. 41/101, movement nos. 39'013 and 39'153, case nos. 152'541 and 152'341, manufactured in 2003
Cal. L901.8 and L901.7 three quarter plate gilt-finished twin barrel lever movements, 54 jewels, screwed gold chatons, finely engraved balance bridges, swan neck regulators, solid silver dials, eccentric hour dials, applied lozenge-shaped and Roman numerals, the white gold example showing the Constellation of Ursa Major, the pink example showing the Constellation of the Southern Cross, large double windows for date, apertures for power reserve, eccentric subsidiary dials for the moon phases combined with lunar calendar and constant seconds, large circular cases, date change buttons in the band, downturned lugs, glazed display backs secured by six screws, 18K white gold and 18K pink gold A. Lange & Söhne buckles, both cases, dials and movements signed
42 mm. diams. (2)
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Prospective purchasers are advised that several countries prohibit the importation of property containing materials from endangered species, including but not limited to coral, ivory and tortoiseshell. Accordingly, prospective purchasers should familiarize themselves with relevant customs regulations prior to bidding if they intend to import this lot into another country.

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Dr. Nathalie Monbaron
Dr. Nathalie Monbaron

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Lot Essay

With A. Lange & Söhne International Guarantees dated 2003, Guarantee & Services booklet, Operating Instructions for each model, pink and silvered setting pins, Wempe Guarantees dated 2004, original fitted wooden presentation box containing a wooden panel inscribed "Luna Mundi Limitierte Edition 41/101", two separate leather storage boxes, outer packaging.

The GRAND LANGE 1 "Luna Mundi" watches display the accurate waxing and waning of the moon as seen on both sides of the equator. The watches were available exclusively in sets of two and the edition is limited to 101 sets, manufactured in 2003 and 2004 and sold out.

The "Ursa Major" model in white gold depicts the moon phases for the Northern Hemisphere while the "Southern Cross" in pink gold accurately reproduces them for the Southern Hemisphere. Both Lange moons emulate the cosmic original very realistically in two respects: firstly, they move continuously and not just in sudden increments once or twice a day as in conventional watches, and secondly, the mechanism was computed so precisely that the displays deviate from the synodic orbit by only one day in 122.6 years.

The "Ursa Major" calibre L901.8 movement comprises 398 individual parts, the "Southern Cross" calibre L901.7 requires four more parts, including an additional wheel that reverses the rotation of the moon disc.

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