A. Lange & Söhne are returning to the 1815 Rattrapante Perpetual Calendar model first introduced at SIHH 2013.

At the same watch trade show, the Saxon watchmaker launched their most complicated wristwatch, Grand Complication, which combines a perpetual calendar, split-seconds chronograph and minute repeater.

The 1815 Rattrapante Perpetual Calendar scrapped the strikeworks, but still combined the same two core complications. While these models may have different specs, they both have a similar composition with four subsidiary dials.

The design for the calendar complication seen on the 1815 Rattrapante Perpetual Calendar was deemed a success at A. Lange & Söhne, so the watchmaker applied it to other collections.

The same multi-layered counters can be seen on other watches, such as the Datograph Perpetual Tourbillon from 2019. Nevertheless, the 1815 series has kept some characteristic features of the collection to itself: the railway-track minute scale, and the use of color to highlight Arabic numerals every 15 minutes accompanied by three dots.

The same features have been preserved on the new version of the model, debuting in summer 2023. It’s already the third 1815 Rattrapante Perpetual Calendar. This perpetual calendar chronograph follows platinum and pink-gold versions, and is now housed in a white-gold case.

It sports a pink-gold dial in the trendy shade of salmon. The case measurements remain unchanged: 41.9 mm in diameter and 14.7 mm in height. Availability of the new version is limited to a series of 100 pieces.

The chronometer is controlled by one of the most complicated movements by A. Lange & Söhne: the manufacture L101.1 movement.

This manually wound movement consists of 631 individual components and uses two column wheels. As per tradition for this Saxon manufacturer, the movement has undergone "twofold assembly".

First, the movement is assembled, fine-tuned, and then taken apart again, so that all the details can be given a final finish by hand. The watch's transparent caseback allows you to appreciate the high standards A. Lange & Söhne adhere to. The engraving is particularly exquisite, which appears on the bridge and "swan's neck" regulator for fine-tuning precision adjustment.