Tourbillon Perpetual Calendar | 720.025F | Platinum for-the-study A "Transitional" Reference

A "Transitional" Reference

Period correct white gold buckle

Having first developed the dual-time functionality for an earlier reference

The case zips around with a concealed coil zip in a matching colour and opens out fully so both sides of the case lie flat

first devised in the last decade of the 20th century

Tourbillon Perpetual Calendar | 720.025F | Platinum for-the-study A "Transitional" ReferenceThis Tourbillon Perpetual Calendar* is a highly complicated time piece that marked the introduction of a tourbillon with an automatic movement into the A. Lange & Shne catalogue, and their first use of the instant jump calendar indication. Only 100 pieces were made in platinum. The watch marks a fascinating point in the history of modern Lange watches. This Tourbillon Perpetual Calendar reference 720. 025F was launched in 2012, introducing a number of