A. Lange & Söhne RICHARD LANGE Perpetual Calendar “Terraluna”

The RICHARD LANGE Perpetual Calendar “Terraluna” combines two classic complications within the iconic A. Lange & Söhne design. The large minute circle is at the top of the dial. Within the minute circle is the large, outsize date. The leap-year indication is located in a small round window on the right-hand side of the 15 of the minute circle.

Beneath these, the smaller dials are offset for the hours and seconds. The calendar is mechanically programmed to correctly display the days and months until 2100, including those in leap years. At the 6-o’clock position is a power-reserve indicator in the form of a circumferential ring.

Turning the timepiece over, the view through the sapphire casebook reveals the patented orbital moon-phase. It shows the current moon phase as well as the changing positions of the moon and sun relative to the Earth as an observer in the northern hemisphere would see them. The day and night halves of this hemisphere are also discernible.

An elaborate constant-force escapement controls the torque store in the twin mainspring barrel to assure a high rate of accuracy for the entire two weeks (14 days) of power reserve.

One of six finalists for TimeZone’s 2014 Watch of the Year, the winner is chosen exclusively by the TimeZone community and the finalist with the most community votes by noon EST on Monday, March 2, 2015 shall win the 2014 TimeZone Watch of the Year Award.

Please vote here.


Reference
180.032 (pink gold) & 180.026 (white gold)
Movement
Manufacture Calibre L096.1 manual-winding mechanical movement with lever escapement, in-house manufactured balance spring, 80 jewels, 21’600 vph and 14-day (336-hour) power reserve.
Functions
Date, Day, Hours, Minutes, Month, Moonphase, Perpetual calendar, Power reserve, Seconds, Year
Case
44.5 mm 18-carat pink or white gold
Dial
Solid silver with either pink gold or heat-blued steel hands

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