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But he became a Master Cutler of the Cutlers' Company only in 1856.
List of Masters.

Yes, it's "Doubly Carbonized I*XL Razor", "Registered Sep.10, 1850. No.2434".

Don't worry:), I hope, we'll find some razors.
One razor from 1850, I've found:
http://www.strazors.com/uploads/gallery/fr_1.jpg

Of course 1694.:)
But where is the all razor?
Impossible to date razor according only these stamps on the photos in the first post.
The razor was made before 1891 and nothing more.