I'm sorry but I do not know how to copy and paste things. But I was just looking at ebay and there is a seller called Petersuchy Jewelers and he has a Speedmaster Pro listed and stamped inside the case 145022-68ST and it does not have the don 90 bezel. Mine has it and I thought all of the 68ST had them, am I wrong on this??
Yes, however it could be a replacement bezel (probably is). Not all Jewelers are well versed in vintage and might think everything is original, when its not. It pays to be a educated consumer when it comes with vintage watches!