Enfield Marking?

[SKScanuck]

Okay, you all know what I'm up too...

Anyhow...I've got most of the markings sorted out but can some one confirm a B inside a circle is Longbranch?

I know S in a square or alone is Savage, P is Pakistani and B is BSA Shirley. But what about a B in a circle?

Here is a photo...

 

[SID 358 NM]

re B

Hi I cant varify it but 3 of my Long Branchs have it a 1942 with ser. # LB mag . a1943 RCAF with LB mag and my pride and joy an unishued #4 MK 1* T with its LB mag .

 

[SKScanuck]

The photo is of a LB Mag, LB serial number on base, LB and C-Arrow marked on side. The follower has a circle B.

It is not in any of my books.