Enfield No. 2 MK I mark question

[Kevinofborg]

I saw a Enfield No. 2 MK I with B.M.C.I. stamped on the cylinder.

Anyone know what that stands for?

Kevin

[RWS]

Commonly believed to be the "steel batch number", and is not an acronym of any sort. Most you see are 3-letter variants (mine is stamped SPB), but some 4-letter markings are out there.

Normally, on the actual steel batch number cylinder marks there shouldn't be a period after each letter like you denoted above. It occurs to me that perhaps you already know about the steel batch number and are asking about a marking that is in addition to the steel batch number? Please clarify.

-Bob

[Kevinofborg]

See attached photo.

[RWS]

Is that the only marking on the cylinder? It doesn't look like a typical steel batch number but absent another 3-letter code elsewhere on the cylinder I really don't know what to make of it. Never seen acronyms on a No. 2 Enfield before.