1:15pm, March 4, 1931 - Reverso Patented by Rene-Alfred Chauvot.
First movements were Tavanes movements (affiliated with CYMA).
1932 First Reverso with Caliber 410
1932 10 cases delivered to PP (JLC was a primary supplier of movements to them at the time)
The first company was launched as "Reverso" - under "Specialties Horologeres."
During the "quiet years," Reversos were made by JLC for Cartier, but the brand also allowed Hamilton, and others to use the design.
Just a little beginning.....
-Dean