1998: Vianney Halter Antiqua, the perpetual calendar that inspired
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 White Gold - K2 Luxury Watches
Antiqua An unusual pink gold perpetual calendar asymmetrical
Vianney Halter - RETROSPECTIVE: 20 Lot 209 November 2020
Retrograde Annual Calendar: Glashütte Original PanoMaticCalendar - Revolution Watch
The Complete History of the Audemars Piguet Perpetual Calendar - Revolution Watch
1955: Audemars Piguet ref. 5516, the First Perpetual Calendar Wristwatch with Leap Year Indication - Revolution Watch
Pioneers of Contemporary Independent Watchmaking – The Horology Club
1998: Vianney Halter Antiqua, the perpetual calendar that inspired a generation of independent watchmakers - Revolution Watch
Introducing H. Moser & Cie.'s Streamliner Perpetual Calendar - Revolution Watch
Weekly Watch Photo - Vianney Halter Antiqua Perpetual Calendar