The only thing I can tell you is that it's a beautiful piece. I know the other styles you are talking about but this one is very interesting. Of course I , as well as everyone else has a soft spot for W&Bs.
I think I may have read some where that the later ones had to say "Shefield England" or had more specifics on the location. I may very well be confused though and can not back that up with anything. Sweet looking razor though.
Yep. All blades made after 1890 (give or take a year or so) have country of origin