These were the first adjustable injectors.
They were designed by well known industrial designer Henry Dreyfuss for the American Safety Razor Company.
It was introduced in June 1962, so predates the Schick by about 2 years. Its a simplistic one-piece design and even today still looks super slick and very "Mod".
At the time of its introduction, it was advertised as The Only Adjustable Injector Razor. In later adverts it was changed to The Worlds First Stainless Steel Adjustable Injector Razor. (Click on the advert below to open it in a larger window).
The adjustment dial functions fine, but I find it a bit small and as a result, I tend to pick a setting and leave it there for the whole shave