I found this about The maker:

Baker Frederick Thomas Baker. The son of Thomas Kerslake »Baker, this gunmaker continued to make sporting guns and rifles from premises at 88 Fleet Street, London, England, from 1858 until 1900 or later. London directories list additional premises at 21 Cockspur Street, S.W. (1882–98), and 29 Glasshouse Street (1899 and later). The name has also been reported on »Eley made shotgun ammunition marked “Baker’s Best”. Trading may also have been undertaken in Birmingham.

On this Site:

Guns & Gunmakers

That means The Gun was built before 1898.
Gunwolf