Rockwell 6C (adjustable w/6 settings) + Feather (Medical) DE blades - sharpest in the world
I didnt think they made those old timey razors anymore
A few months ago, I happened to come across a new pack of double edge blades in one of my kits.
I knew I had a couple of old double edge razors, probably belonged to my Father originally. I sprayed it with silicone oil and managed to get rid of most of the corrosion.
The blades were perfect.
I then tried it out and to my surprise, it gave me a perfectly acceptable shave. Still not quite as good as some of the newer multi blade ones but I could certainly live with it.