There is an amazing variety of designs for early shock resistance in wrist watches resulting from the desire to avoid patents, although there are records of lawsuits between manufacturers. Incabloc was introduced in 1934 and Parechoc ten years later in 1944. Shockresist was the more obscure of the three common Swiss systems and seems to appear in 1936.
Some say Incaflex was the most reliable. It showed up in 1927 and rather than focus on the balance jewels, was based on springing the balance wheel itself.
Shock resistance wasn't practical for pocket watches despite Breguet's early Parechute design. They weren't subject to the same sudden movements as wrist watches but, if dropped, the greater weight virtually ensured damage. Hence the gimballed boxes and transit cases used to protect timekeepers used for navigation, communication, and other critical functions.
This is a nice illustration found on the 'net, but the Besfit repair catalog of the period listed over 80 different types of shock protection!