Omega’s tourbillon movements were built to high standards and did well in the trials, but such competitions were essentially meant for R&D purposes as well as overall brand prestige — they were mostly never even put in watch cases. There were a total of 12 of these tourbillon movements made, and they took part in the observatory trials between 1947 and 1952. In 1987, seven of the tourbillon movements were rediscovered by Omega, rebuilt, cased, and sold to collectors. There was one more, however, that was originally cased in 1947 as a prototype with the apparent intent to eventually put it into production… More here.
This watch is from 1947 which kind of shows how little has changed in general watch design since.