Everything Glen said is true.
It was an established variety of semi-fancy blade grind going back to at least the first decade of the 1800's. I have seen pictures of late 1700's razors that have the added hollowing along the spine, but that's slightly different.
As long as you use tape, it shouldn't be any different to hone than any old Sheffield razor is from any other old Sheffield razor -- which is to say fairly different.
Here's some more examples, including another one of the model of Gilchrist JBHoren posted upthread (this is what the original scales looked like! :D )
Attachment 295568
And here are two rattler grind razors without the extra hollowing, one by Horrabin, the other Jonathan Crookes.
Attachment 295569
And from the 1812-15 Smith's Key, this very oddball version on the top:
Attachment 295570