This inexpensive model brought watches to the masses. By 1916 Ingersoll was making 16,000 watches per day. Many of these were pocket watches with wire lugs attached to accommodate a strap. The watch is sold commercially in 1911 and is still one of Cartier's most popular models and much imitated. The Rolex name was not officially registered until 1908.
Omega introduces the first minute repeater wristwatch.
The movement was made by Audemars Piguet. There were other watches with curved cases, but a curved movement was a new technical achievement. This would become Citizen in 1931. Charles Edouard Guillaume wins the Nobel prize for inventing Invar and Elinvar. The composition of these metals causes them to be almost unaffected by temperature variations.