I went to an antique stor, and found a DE razor. I couldnt find any patent/model/letters on this one. All I found was Gillette imprinted on the bottom of the head. It was all silver, non adjustable, and the top screwed off(three piece) to change blades. Any ideas? I'll go back again and see if I can find any numbers or anything. I'm thinking of purchasing it. Its in really good shape. any thoughts on the matter? thanks for the help in advance.