Every now and again, a happy coincidence is spotted and some modern blade is found to just work ...
Bulldog Face Wash
Bulldog Shave Gel
Gillette Platinum Plus 
Hot Rinse, Cold Rinse & Alum Wash
Selin Lemon Cologne
Well, if that wasn't one of the softest, safest, smoothest and downright most surprising shave I've ever had, I don't know what is!
Since first seeing the Kriss Kross, I was intrigued. The handle sweeps through a full 180 degree arc, permitting the shaver to select his angle; mimic the straight edge, go conventional safety razor or effect a slant. Shame the blades are no longer available. By happy coincidence, modern injector blades fit perfectly - just press the pivot, insert a blade and let the pivot clamp back down.
I still can't get over just how soft the shave was - I was concerned that the blade was not making contact, but the stubble removal was quite evident. Perhaps it's another happy coincidence that this frame can came these very sharp Gillettes?