Assembly Commentary - Ludwig Oechslins Perpetual Calendar

Assembly commentary — Ludwig Oechslin’s perpetual calendar

Assembly of Ludwig Oechslin’s perpetual calendar

Ludwig Oechslin’s perpetual calendar

Set the time and date — Ludwig Oechslin’s perpetual calendar

Common year — Ludwig Oechslin’s perpetual calendar

Leap year — Ludwig Oechslin’s perpetual calendar

Months with 30 days — Ludwig Oechslin’s perpetual calendar

Forwards and backwards — Ludwig Oechslin’s perpetual calendar

A wooden Perpetual Calendar from a design by Dr.Ludwig Oechslin

Set 3 dates — Ludwig Oechslin’s perpetual calendar

1 of 16 — Ludwig Oechslin on using gears

2 of 16 — Ludwig Oechslin on date displays

Chapter 1: In The Beginning (The watch that changed the world)

Revolution Watch

11 of 16 — Ludwig Oechslin on reliability

12 of 16 — Ludwig Oechslin on rigorous simplicity

14 of 16 — Ludwig Oechslin on the concept of ochs und junior

16 of 16 — Ludwig Oechslin on his goals

Ochs Und Junior Introduces The Calendario Cent’anni, “CCA”