Watch Wiki

The Best Watches and Watch Brands

User Tools

Site Tools


IWC 7906

The 7906 (and derivative 79061 and 79261) is an automatic chronograph perpetual calendar movement produced by IWC based on the Valjoux 7750 ebauche from 1985 through 2016.


The Valjoux 7750 movement was extremely important to the resurgence of IWC and the basic design remains in use today. The company has used it for many important innovations since the 1980's, including a perpetual calendar, rattrapante, and grande complication. The 7750 ebauche was used for the 790 family of movements and the basic architecture is the basis for today's 69000 family of movements.

In 1985, IWC surprised the world with the introduction of an innovative perpetual calendar movement, Cal. 7906. Designed by the legendary Kurt Klaus, this movement was much simpler to operate than previous perpetual calendars and was reliable and relatively affordable as well. It began with a Valjoux 7750 ebauche before being disassembled and modified by IWC. The movement was refinished and plated with gold, then assembled and regulated by the company.

The original Cal. 7906 used a steel plate for the perpetual calendar module. Starting in 1987, IWC switched to a gold plated brass plate, renaming the movement Cal. 79061. Original Cal. 7906 movements were typically swapped out for this improved movement when watches were serviced by IWC. In 1996, IWC began using the Triovis regulating system rather than the original Valjoux Fine Regulator. This movement was named Cal. 79261 and is also swapped during service.

The Klaus perpetual calendar movement has remained in production for decades. As recently as 2016 IWC has produced new IWC Da Vinci Perpetual Calendar watches with this movement. A minute repeater variant, Cal. 79091 was introduced in 1991 for the Grande Complication, Ref. 3770, and a rattrapante version, Cal. 79251, followed in 1995 for the 10th anniversary of this movement.

Movement Family

  • 7906 (1985-1988) - Steel plate
  • 79061 (1987-1996) - Brass plate
  • 79261 (1996-2016) - Triovis regulator


iwc_7906.txt · Last modified: 02.12.2022 20:38 by

Donate Powered by PHP Valid HTML5 Valid CSS Driven by DokuWiki

© Watch Wiki. All texts are protected by copyright. The respective copyright holders are the signatories of the contributions. For details see Impressum. Regarding objections and complaints (copyright and other rights) also see there. Impressum | Privacy Policy | Copyright | About Watch Wiki