HSTE[Omega Moderator]
4537
Ok, gently forced to show pictures of my Speedmaster "220 bezel".
My watch: Omega Speedmaster ref. 145.022-69 delivered on September 30, 1970 to the US of A.
Now, the story on the "220-bezel": A small number of bezels in 1970 had a marking error: instead of the usual graduations marked 225, 200, 190 on the scale, these bezels had inscribed 225, 220, 190. It was not a special version but a genuine mistake. The examples have been recorded on movement numbers 30.589.xxx to 31.100.xxx, all of them being produced in the fall of 1970 (information courtesy "Gregoire Rossier & Anthony Marquie: Moonwatch Only").
Cheers, HSTE