These are the earliest Bren gun I have on record,

Inglis M93, M120, M155, M177, M244, M537
Enfield A113, A133, A324, A374
Lithgowicon A2, A5, A22, A28, A33, A38, A40, A42, A53, A63, A68, A79, A106, A123, A124, A128, A129, A145, A202, A223, A230, A232, A243, A244, A250, A254, A261, A264, A286, A307, A319, A331, A377

Enfield Revolver

Enfield 1, 42, 52, 177, 188
Albion A1353

STEN Mk1

N052740, N070927, N078957