A Lange & Sohne DATOGRAPH PERPETUAL combines chronograph and perpetual calendar, solid 18K white gold case and gray dial, precision and elegance.
The dark gray dial tone to make the display more prominent, and decorated with gold stars deep blue moon phase disc stark contrast. 18K gold-plated rhodium bar hour markers, hour and minute hands. Timing pointer shows the exact five tenths of a second of stopping time by blue steel crafted. Integral plate and the second hand has chosen the same material, eye-catching in a small silver dial background. By 556 fine component parts of the movement, and further confirms the plant from Saxony Lange watchmaking virtuosity in a complex field devices.
Movement
Lange watch factory-made L952.1 type movement; manual winding, in line with the most stringent quality standards Lange, well-groomed and assembled by hand; five position precision adjustment; plywood and deck made of untreated German silver; Hand-carved balance cock
Movement parts
556
Jewel bearings
Forty five
Screws gold sleeve
4
Escapement
Lever escapement system
Oscillating system
Earthquake balance wheel with eccentric weights; watch factory-made balance spring, vibration frequency of 18,000 times per hour, combined with the lateral fixing screws and gooseneck precision tuning lever system
Power reserve
After the full chain can provide 36 hours of power reserve
Function
Hours, minutes, seconds, stop device with small seconds; with precisely jumping minute flyback chronograph; speedometer scale; calendar with day, week, month, moon phases and leap year; day / night display
Operating elements
Crown for winding and setting the time, two buttons for operating the chronograph buttons for quick correction while promoting all calendar display, hidden correctors were tuned week, month and moon phase display
Case Size
Diameter: 41.0 mm; Thickness: 13.5 mm
Movement Dimensions
Diameter: 32.0 mm; thickness: 8.0 mm
Case
18K white gold
Dial
Solid silver, gray; silver subdial
Pointer
Rhodium-plated 18K gold hour and minute hands with luminous function; 18K gold-plated rhodium week, month, and four pointers; blue steel chronograph sweep second hand, small seconds and integral disk pointer
Crystal and bottom
Sapphire crystal (Mohs hardness 9)
Watchband
Hand-sewn alligator leather, black
Clasp
Lange 18K white gold pin buckle
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