i would rank the anglo american aristocrat as prototype, too
I think it was at best inconsiderate of Gillette to do this and only leave these breadcrumb trails every ten years or so.
1940ish Regent Tech. No advertising found that I know of.
1950ish The Anglo American Aristocrat and the American Rocket. No advertising.
1960 Bottom Dial, Chrome Toggle, Red Dot Fat Boy No advertising.
Just plain inconsiderate......