No4 MK1 T

[Seaforth72]

Yes, the circular mark appears to be a Belgian mark. I had the same mark on a Long branch No. 4 Mk. I* (T) in the same position. That rifle had the metal refinished in the grey such as the Belgians are known to have used. A similar monogram mark was used for Liege years ago on firearms.

The "K B" marking s found on some Long Branch made rifles and appears to be a 1945 marking, probably by an inspector.

The "16" is likely a rack number for use by the storesman. I have not seem such a marking in this location before.

Your example appears to be on a Canadian made Long Branch. Can you tell us the rifle's serial number?