top of page


  • Writer's pictureMarc Jenni

Perpetual Calendar by MJ

Updated: Feb 9

Location: Zurich, Switzerland

Date: March 21, 1997

A perpetual calendar entirely designed and manufactured by... myself! That was one of the greater challenges I confronted myself during the apprenticeship. And yet, it was entirely my fault, I wanted to do something special, something which stands for my 4 years apprenticeship with Paul Gerber... my own personal masterpiece.

I started with laying down the architecture for the calendar during my 2nd year of apprenticeship and worked on this special project almost entirely during my sparetime, after my regular work, during evenings, saturdays and days-off... 

But prior to start with the manufacturing of the parts and components I needed to repair the old chronograph movement I received from Oscar Schwank. He used to by my dad’s former master and is a well respected watchmaker and vintage timepiece collector.

I won’t write a detailed description of each manufacturing step and keep this topic open for a future special workbook diary!


bottom of page