Bonhams 1793 : A. Lange & Söhne. A very fine and rare PT950 platinum perpetual calendar automatic wristwatch with moon phases Langematik Perpetual, Ref:310.025, Case No.134479, Movement No.24462, Circa 2007

Langematik Perpetual, Ref:310.025, Case No.134479, Movement No.24462, Circa 2007
43-jewel Cal.L922.1 automatic movement with straight line lever escapement, monometallic balance adjusted to 5 positions, 21ct gold bi-directional rotor with platinum edge and hand engraved balance bridge, solid silver dial with applied white gold Roman numerals, luminous filled white gold hands, subsidiary dials for month and leap year, days of the week, 24 hours with day/night indication and running seconds, apertures for oversized date at 12 and moonphases at 6, brushed and polished round case with screwed exhibition case back, rounded bezel, rectangular pusher on the band to adjust date, fitted leather strap with PT950 platinum A. Lange & Söhne deployant clasp, together with box and certificate, case, dial and movement signed
38mm.

Estimate:

HK$ 350,000 - 420,000
US$ 45,000 - 54,000
£30,000 - 36,000

Footnotes

朗格 PT950鉑金男裝萬年曆自動腕錶具月相顯示約2007年

The 165 year heritage of this Saxon manufactory is known for its exemplary quality, micro-engineering finesse and sophisticated aesthetic. Each of A. Lange & Söhne's timepieces bears the following distinctive characteristics hand-engraved balance cock with the whiplash precision index adjuster, screwed gold chatons and German silver three-quarter plate.
Langematik Perpetual is the first timepiece in the history of watchmaking that features a perpetual calendar, an outsized date and a mechanism that allows each calendar display and moon phases to be adjusted individually as well as collectively. The regular model, such as this present lot, is featured with a solid silver dial housed in either 18ct rose gold or PT950 platinum case.