Secular Perpetual Calendar

In his comment to my thread dedicated to the Patek Philippe/Somazzi partnership , our dear Gordon aka GLau asked me how many retailers were able to have their signature on some Patek Philippe watches . Here's my answer : A / I have identified 58 retailers

In 1989 , Patek Philippe celebrated its 150th anniversary with 8, or should I say 9, timepieces. Concerning the first 8 , the official brochure stated: “For our 150th anniversary we have created eight new models to demonstrate our skills, standards and va

Schaffhausen/Geneva, 13 th November, 2024: IWC Schaffhausen’s Portugieser Eternal Calendar has received the “Aiguille d’Or” at the 24 th Grand Prix d’Horlogerie de Genève. Launched earlier this year, the Portugieser Eternal Calendar is IWC’s first secular

...the IWC is not only a secular perpetual calendar but it's an "Eternal" perpetual calendar and as such not only it takes into account the non-leap year centuries but if works (or should work, as no one would be here to verifiy) until the year 4000, for

Schaffhausen/Geneva, 9 th April 2024: IWC Schaffhausen unveils its new Portugieser collection at Watches and Wonders in Geneva. Building on its unique expertise in calendars, the Swiss luxury watch manufacturer introduces the Portugieser Eternal Calendar.

Schaffhausen/Geneva, 9 th April 2024: IWC Schaffhausen introduces the Portugieser Eternal Calendar at Watches and Wonders Geneva. Drawing on the extensive calendar expertise it has acquired since introducing the perpetual calendar almost four decades ago,

There is a difference between a properly executed rattrapante and one that is less refined. And chronographs in general are one of the most complex of complications even if they are ubiquitous. I would say the same difference exists when one considers per

It addresses the "secular year" that happens once every 100 years for 3 out of every 4 centuries. The backside of his watch actually accounts for it and tracks the next 400 years. Absolutely marvelous. But it does beg the question: Do I need to swap out t

Just curious, do you happen to know of any producers of secular perpetual calendars? Andersen is the only one I can think of and his are produced by request these days. I don't know of any producers of a secular perpetual calendar outside of Andersen. It

30+ years ago, a fairly common consensus was the Rattrapante (until simplification via IWC's 3711), or the tourbillon that's now available via suppliers for many middle-tier brands, or the perpetual calendar (again, simplified by IWC's da vinci) that can