GB straight razor ?

[100fuegos]

Hello gentlemen:
Today i went to an antiques shop here in my city Santiago de Chile.
I found a very nice razor.








For me it is a wedge or very near.
On blade almost vanished I can read "Nº 2", with magnifier lens.
On spine is etched "Silver Steel" and what i think is a arrow.
Tang stamped with GB and a cross (+)





According to seller, who BTW considered the most important thing, scales are ivory. They are thin and cute.
Is there someone who knows anything about my new/old razor?

Thanks for any help and greetings from Santiago.