Launched in 2006, the A. Lange & Söhne Datograph Perpetual combines two outstanding complications: Flyback Chronograph and Perpetual Calendar.
The Datograph Perpetual is available in platinum and 18 carat white gold versions. The 41mm diameter case houses the manual-winding in-house calibre L952.1, which can be admired through the sapphire crystal case-back.
The Datograph Perpetual Platinum model has solid silver rhodié dial where as the 18K white gold variant features solid silver grey dial.
The watch performs Flyback chronograph function with precisely jumping minute counter and centre chronograph seconds hand. The perpetual calendar mechanism incorporates outsize date, moon-phase display, day-of-week, month, four year/leap year, and day/night indication. For displaying the time, it has two centrally placed hands (hour and minute) and a small-seconds dial.
The Lange Datograph Perpetual watch comes with a crocodile strap or precious metal bracelet. With a diameter of 41mm, it ranks among the larger Lange timepieces.
Model: A. Lange & Söhne Datograph Perpetual
Reference 410.030: Lange Datograph Perpetual, 18K white gold case; Solid silver, grey dial with rhodium-plated gold and blued steel hands; Crocodile strap.
Reference 410.430: Lange Datograph Perpetual, 18K white gold case and bracelet; Solid silver, grey dial with rhodium-plated gold and blued steel hands.
Reference 410.025: Lange Datograph Perpetual, Platinum case; Solid silver, rhodié dial with rhodium-plated gold and blued steel hands; Crocodile strap.
Reference 410.425: Lange Datograph Perpetual, Platinum case and bracelet; Solid silver, rhodié dial with rhodium-plated gold and blued steel hands
Lange manufacture calibre L952.1, manually wound, crafted to the highest Lange quality standards and largely assembled and finished by hand; precision-adjusted in five positions; plates and bridges made of untreated German silver; balance cock engraved by hand
Number of parts: 556
Screwed gold chatons: 4
Escapement: Lever escapement
Balance: Shock-proofed glucydur balance with eccentric poising weights; superior-quality balance spring produced in-house, with patent-pending attachment design (balance spring clamp),frequency 18,000 semi-oscillations per hour, precision beat adjustment with lateral setscrew and whiplash spring
Power reserve: 36 hours when fully wound
Flyback chronograph with precisely jumping minute counter; perpetual calendar with outsize date, moon-phase display, day-of-week, month, four year/leap year, and day/night indication, hours, minutes, small seconds with stop seconds, tachometer scale
Crown for winding the watch and setting the time, two push pieces for operating the chronograph, a universal corrector for simultaneously advancing all calendar displays plus one recessed push piece each for the day of the week, the month, and the moon phase.
Case diameter: Ø 41.0 mm
Case thickness: 13.5mm
Glass and Caseback: Sapphire crystal glass
Solid silver, argenté or rhodie
Rhodium-plated gold and blue steel hands
Crocodile strap or precious metal bracelet
Courtesy: Lange Uhren GmbH