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Item number: 410.032
Brand Name: A Lange & Sohne
Style Number: 410.032
Also Called: 410032, Datograph Perpetual Rose Gold Silver Dial
Series: Datograph Perpetual
Style (Gender): Mens
Case Material: 18k Rose Gold
Dial Color: Silver
Movement: Manual Winding COSC
Engine: L952.1 (18,000 vph, 45 rubies)
Functions: Hours, Minutes, Chronograph, Perpetual calendar, Tachometer (on flange)
Watch Chronograph: 1/5 second flyback chronograph with jumping minute counter. The precise minute counter at 4 o'clock prevents misreadings of the minutes by jumping through one minute intervals. With a single press of the chrono flyback button, the chronograph is reset and instantly restarts. The chronograph is driven by a classic column wheel.
Crystal Material: Sapphire - Anti-reflective
Case Diameter: 41.0 mm
Case Thickness: 13.5 mm
Caseback: Transparent Exhibition Display Back secured by six screws with Hallmarks and Lange engravings
Bezel Material: 18k Rose Gold
Bezel Function: Fixed
Crown Material: 18k Rose Gold, Fluted with A Lange Soehne engraving
Calendar: Perpetual calendar: large date, moon-phase, day-of-week, month, leap-year, day/night indicator
Power Reserve: 36-hour power reserve
Watch Bracelet / Strap Material: Leather - Brown Crocodile with 7 perforations.
Watch Clasp Material: Rose Gold Tang Buckle. Hallmarked, engraved LANGE.
Max Wrist Size: 8.5 inches
Watch Bracelet Width: 17.0 - 20.0 mm
Additional Info: Plates and bridges are made of untreated German silver decorated with perlage and Glashutte ribbing. The plates, bridges, whiplash spring and classic column wheel are chamfered and polished. The balance cock is hand-engraved. The large two-digit date apperture is at 12. The day of the week subdial is at 8, with the small day/night indicator dial just above it. The moon-phase display is at 6 o'clock. The month subdial is at 4 o'clock, with the small leap-year dial just below it.
This remarkable timepiece is the first to incorporate a perpetual calendar with a chronograph. The calendar is accurate until the year 2100, when, because the year 2100 is not a leap year (it is a century year that is not divizable by 400), the calendar will require a manual advance of 1 day. The moon-phase is itself an incredibly precise movement, accurate for 122 years, after which, it too will require a one day adjustment. An ingenious interlock device prevents accidental date resetting on the Datograph Perpetual. After pulling out the crown and disengaging the interlock, the perpetual calendar can be purposefully reset. The calendar mechanism alone accounts for 223 parts.Limited Edition
