I never expected to find this marking on an "Enfield" action.
Braendlin Armoury was part of the Birmingham Gun trade, they made various firearms including trade pattern military rifles such as the Martini Henry and the Braendlin-Albini rifle.
I beleive they were linked in some way to Tranter or shared the same premises, they were disolved around 1890 but had a presence under a different owner to around 1915.