excuse my limited nomenclature but I am seeking to identify a particular gillette safety razor. Here goes. It is vintage and a three piece, but with a difference. While the normal three piece has a top and bottom head that screws into the handle, this model resembles the modern two piece and the bottom of the head is connected to the handle. The top of the head has a shaft attached that is screwed into the handle via the bottom of the handle which turns. Can anyone tell me the model(s) I am looking for? Thank you very much!