I have a 1952 (X1) Super Speed with nothing on it but the Gillette logo and X1 on the underside. No patent stamps or "made in" on it. Handle is SS, not Rocket. End caps are not the pointed Brit style. So it walks and talks like a U.S. Super Speed but has no country of manufacture on it. I bought it in a Canadian antiques store for five bucks. It is the same as the '51 on the Mr. Razor site. Did Canada ever manufacture Super Speeds for their own market? This seems to be a mystery. Has anyone got to the bottom of it yet?