George Wostenholm is the firm behind the I*XL and IXL stamps, one of the most collectible English makes. The dating key here is not the trademark but the factory address: Rockingham Works up to 1847, and Washington Works from 1847 onwards. The firm’s own founding date is less useful, because it gives two different answers.
The first works, and the razors of this era are placed by the address rather than by anything on the blade.
From 1847 the firm works out of Washington Works, and the I*XL stamp runs through the whole later history of the make.
1 George Wostenholm (I*XL) models are catalogued with their production years, specs and safety notes.
Browse the models →No. I*XL, or IXL, is the Wostenholm trademark rather than a code, and it was used across the firm long production history. The address eras and the country mark are what bound a razor here.
Compiled from 50 published sources — the source library.