Nice to see that you don't bother setting the date on yours, either There are some precious metal Speedy LEs over the last 50+ years that were 99 or less. And I think the production of their $125k watch is a bit less.
Original Railmaster 2777-2 circa 1955. Issued with special Caliber 283 with Swan Neck Regulator . Perhaps 20 were produced for the Canadian market. The movement was never used again. They were so obscure that Omega, circa 2000, had no idea these Railmasters, or the movement, ever existed. It took many years of research by @Bill Sohne to solve the mystery. https://www.watchprosite.com/page-wf.forumpost/fi-677/ti-401501/pi-2398426/
Platinum anniversary Speedmaster was made in a total of 69 pieces. I don't know if it was the lowest but it's got to be close. It's incredible in the metal!
There were only 12 tourbillon calibers made in 1947 for the Observatory Competitions, of which only one is known to be in a wristwatch.
https://www.omegawatches.com/watch-omega-specialities-first-omega-wrist-chronograph-51652483004001 Limited to 18 pieces
this one? would love to own a tourbillion one day https://www.omegawatches.com/watches/de-ville/tourbillon/the-blue-edition/product and a video of it: