With its steampunk style that was ahead of its time, the Vianney Halter Antiqua was one of the most important perpetual calendars of its time.
Antiqua A pink gold perpetual calendar wristwatch with leap year
Patek Philippe Reference 5236 Perpetual Calendar
Character is Forever: The Perpetual Calendar - Revolution Watch
Patek Philippe Combines the Annual Calendar & Travel Time Complications in the New Ref. 5326G-001 - Revolution Watch
VIANNEY HALTER. A VERY RARE AND HIGHLY UNUSUAL PLATINUM
Vianney Halter, DEEP SPACE TOURBILLON
The 50 Most Important Watches Ever
The A. Lange & Söhne Perpetual Calendar Tourbillon Handwerkskunst - Revolution Watch
Why the Overseas Perpetual Calendar Ultra-Thin Skeleton is the Coolest Debut of 2020 - Revolution Watch
Peter Speake designs Frederique Constant Slimline Perpetual Calendar
The IWC Big Pilot's Watch Perpetual Calendar Top Gun Lake Tahoe
Halter and Barnes - The Time Travellers – The Hour Glass
1998: Vianney Halter Antiqua, the perpetual calendar that inspired
The Basics and Beyond: Perpetual Calendar - Revolution Watch