GRINDER straight razor, need info...

Not the prettiest but I picked it up cheaply from a member here and it give a surprisingly nice shave. I have tried to find some info on it with no luck, would anyone know anything about this 5/8 GRINDER?

On one side it says GRINDER and on the other FORGED & GROUND IN SHEFFIELD.

Here are some pics...

http://scott-halford.smugmug.com/pho...85_ne3aM-L.jpg

http://scott-halford.smugmug.com/pho...79_PELVV-L.jpg

http://scott-halford.smugmug.com/pho...89_s8vbD-L.jpg

http://scott-halford.smugmug.com/pho...96_4sfjb-L.jpg