For about seven years I tried to find razor with the stamp "Cutlers to Her Majesty". Here're some old threads:
http://straightrazorpalace.com/razor...ml#post1009516
http://straightrazorpalace.com/razor...tml#post954706
.......
I've seen different knives and razor boxes with such stamp, but never on the razor blade. And here it is - Harrison Brothers & Howson, Sheffield.





This razor has this stamp: