I won a gold toggle on a local auction site, and it arrived today. It looks minty, in the original case, with the cardboard outer box, warranty card, and what looks to be a full dispenser of blades. I didn't know what year it was made when I bid on it, but it has the D1 date code for 1958. I've had two of these razors before, both were F4 razors. Are the D1 razors much less common than the F4 models?
