The A. Lange Söhne Perpetual Calendar Terraluna is big (45.5mm) and busy for a Lange timepiece, but retains the brand’s signature classic aesthetic. As a high complication, it conveys a lot of information but does so smoothly and elegantly. Hours are shown regulator-style in the subdial at four o’clock, with overlapping minute and seconds dials. There is also a leap year indicator, a rare and expensive complication, in the upper right. The caseback is a dramatic orbital moonphase display with not only moonphase but the moon’s position in the night sky from the northern hemisphere – so the watch also functions nicely as a nice day/night indicator. The balance wheel serves as the sun, and three moving disks represent the sky, earth and moon.
The A. Lange Söhne Perpetual Calendar Terraluna is big (45.5mm) and busy for a Lange timepiece, but retains the brand’s signature classic aesthetic.
The movement, Caliber L096.1, is driven by two barrels and a constant force mechanism that ensures efficiency and regulates the torque. The result is unvarying amplitude and a high rate of accuracy. Other Lange signatures include a hand-engraved balance cock and lavishly hand decorated movement.
