Perpetual calendar

Introducing The F.P. Journe Quantième Perpétuel (With Specs And Price)

A complete revamp of the perpetual calendar by F.P. Journe, featuring a window-based display and easy setting.

SIHH 2013: Rotonde de Cartier Perpetual Calendar Chronograph (live pics and pricing)

News: IWC Big Pilot Perpetual red gold with gold dial

Hands-on with the Lange 1 Tourbillon Perpetual Calendar in platinum (with live photos and pricing)

Though it was the new Datograph Up and Down that got most of the attention at SIHH 2012, Lange's flagship complication for the year was actually the Lange 1 Tourbillon Perpetual Calendar in platinum. 

Up-Close With The Blancpain Villeret Traditional Chinese Calendar (With Original Photos & Price)

My favourite Patek from Basel 2012 – the 5940J pepetual calendar

Blancpain creates traditional Chinese calendar wristwatch

Introducing The Patek Philippe Ref. 5204P Split Seconds Chronograph With Perpetual Calendar

Up Close With the H. Moser & Cie. Perpetual 1 Golden Edition (with Original Photos & Price)

Urwerk unveils the UR-1001 Zeit Device pocket watch