Search:

Notice how different it is from the razor in the OP which is not a frameback. It is, however possible that it was a frameback and was reground - I can't see very well the transition at the shank but...

The rest of the geometry doesn't seem anything special - it's a typical sheffield medium hollow ground swayback, may be a little more curvature to the spine than most.

Yeah it's a more unusual model, but there are other razors with similar ledge on the spine. Both Sheffield and Solingen. I'll try to take pictures and upload them in the database next time I stumble...