Williams. Not sure exactly when, since it's out of my niche, but definitely post-war, either 50's or 60's or perhaps later. Someone will know. 3bay. It was a short-lived logo.
Can’t find the thread right now,maybe it was on the Garage Gazette, but there was a major breakthrough recently when Twertsy posted the Williams trademark info on that logo. Maybe he will chime in and refresh us on that.