Paul Wyler, Swiss watchmaker, has founded his brand "Wyler" with his brother Alfred in 1924.
In 1927 he patented his "Incaflex" invention.
What is "Incaflex"?
It's a balance wheel with flexible arms to absorb horizontal shocks (see pic).
To do business in Italy in the 30's (Mussolini ruled Italy from 1922 to 1943) foreign compagnies
had to partner with Italian compagnies.
Lucio Binda, An Italian watch retailer formed a business relationship with Wyler.
Watches were sold under the Vetta and Wyler-Vetta brands. They still exist today.
Incaflex balance wheel
This Watch was nicknamed Vetta-Cartier
or Cartier at the Ferrari factory.
( 1953 Christmas gift from Gigi Villoresi to Alberto Ascari.)
(pics courtesy of a private collector)