Thanks for the extra info.
I finally picked it up Monday, and its pristine, having been holstered in service and in a collection since the 80s.
Indeed, I do have a Nill thumb rest on my non B 75SA as you can see, wonderfully tight tolerances, and shoot wonderful, and the wooden grips that came on the short rail fit well.
I do like a swell in general and these are super "round", very fat, but just really work well for this pistol. CZ stock rubber are comfortable but ruin the originality of the pistol, and the Nill fit well and are my usual go to, but suit the balance of the 75SA better.
I do have the wooden waffle coming, but after testing this week , the stock wooden might just be the way to go.
