This Tourbillon Perpetual Calendar reference 720.025F was launched in 2012, introducing a number of elements that had never been seen before in A. Lange & Söhne watches. This was the first Lange watch to feature a tourbillon with automatic movement, as well as instant-jump calendar indications. This is an especially limited edition of 100 watches that were created in platinum. The series was followed by the Handwerkskunst edition in 2013, and the 25th Anniversary edition in 2016.

The arrangement of the dial is typical for automatic Lange 1 pieces, with the positions swapped between the oversized date window and the hour and minute display, which are placed on the left and right respectively. The seconds sub-dial is integrated with the moonphase, which is set at a slanted angle instead of the typical horizontal orientation. Meanwhile, the power reserve indication has been removed completely, instead replaced with a retrograde day display to the left of the dial. The change was made to the dial so that the wearer would not have to completely pull back their sleeve to view the time, but could still read the time quickly when glancing down.

Further additions can be seen with the month ring, which can be found on the periphery of the dial, where the months are indicated by a small triangle pointer near the bottom of the dial, with a small leap year aperture placed directly above, marking the cycle. The calendar mechanism was built around the tourbillon, with the entire calibre integrating the gear train, calendar, and automatic winding features.

The watch is driven by the calibre L082.1, and the tourbillon complication can be seen through the sapphire caseback, set at the bottom of this intricately finished and decorated movement. The golden rotor is engraved with "A. Lange & Söhne", and the tourbillon bridge is hand-engraved with initials instead of the typical floral decoration. As is the case with all of A. Lange & Söhne watches, the movement is made from German silver, and features beautifully polished and finished parts, with brushed and chamfered levers, perlage decoration on the base plate, and Geneva stripes.

Closer look

Condition

This A. Lange & Söhne Tourbillon Perpetual Calendar is in very good condition throughout. Light superficial marks are found on the polished bezel, lugs, and brushed mid case, consistent with minimal wear over time. The dial, hands, and movement are free from any signs of imperfection. The hallmarks and engravings on the caseback are crisp and well defined.

Warranty

The watch comes with a two-year warranty from A Collected Man, alongside a lifetime guarantee of authenticity.