Why, indeed I do! :)
This belongs to a friend of mine, I did some restoration work on it.
Attachment 86065
This is my other GR stamped Wade & Butcher, which I suspect is from the early part of George IV's reign.
Attachment 86066
And over in this thread, is a very interesting specimen: Slartibartfarst's Joseph Rodgers.
So, based on what I've seen, the razors with the crown between the letters are 'later'. In the case of the W&B in this thread, I think that just means 1825-1830.
According to Lummus, the practice of using sovereign marks began with George IV and ended with Victoria. I've not seen any post-Victorian sovereign stamps (I know that folks were arguing that the Rodgers in that linked thread was, but based on the blade shape I would be really surprised if it weren't just a reground 1820's razor -- all the other blade features are actively odd for post-1910). All of the crowns I've seen stamped from before George IV don't bear any initials, and I'm doubtful they mean the same thing.
However, I'm not really comfortable relying on a single source for that kind of information, and I'd love to have more data points, even if they are contradictory.