Today I decided to try a vintage Wilkinson Sword blade in my 62 Slim Adjustable at #4 and ended up with a very smooth shave. I'm not sure of the blades age, but the packaging is a plastic dispensor with a black background label. The blades were smoother than a Derby, but not as sharp as a Feathers or Gillette 7'Oclocks. I will use it for the next few days to see how the edge lasts. Does anyone else have knowledge of these blades?