The article Visual Complications from the past: Cartier Pasha Day & Night explained in a nutshell how Cartier build their famous Jour et Nuit and Mystery clocks in the thirties. Quite remarkable, since at that time La Maison was a small company with just a few watchmakers on the payroll. 
This makes it even more special that in these early years, Cartier introduced amazing visual complications like the Mystery clock and the Day & Night clock.
Click to read the full article I wrote for FRATELLOWATCHES.
