Launched during the Salon International de la Haute Horlogerie (SIHH) in 2006, the Datograph Perpetual in platinum remained in production until 2011, and since, very few examples have appeared publicly, especially with an accompanying platinum bracelet. The elegant display includes a 60-second counter and a 30-minute counter, as well as indications for the day of the week, month, leap year, and day/night. This model was the first wristwatch manufactured by A. Lange & Söhne to combine a chronograph with a perpetual calendar, and has the additional useful flyback function, which is activated with the top chronograph pusher.

The brand’s signature oversized date apertures are opposite to the comparatively smaller moonphase window. Turning the watch over, one can glimpse the 556 individually hand-finished components, including the free-hand engraved balance cock and delicate "Glashütte" waves throughout. The solid rhodium silver dial creates a pleasant monochromatic effect when paired with the 41mm platinum case and bracelet. The hint of blue at the day-night indicator and the moonphase aperture provide a subtle complement to the blued steel hands found within the two sub-dials. The watch’s most impressive feat remains the contrasting elements of a delicate dial design and the striking weight of the case. Further enhancing its appeal is the hardly ever seen, factory bracelet made of platinum that was specially ordered by the original owner at great expense. Sumptuous, luxurious, and exquisitely crafted both inside and out, this example of the Datograph Perpetual will delight the seasoned collector.