the unit or meaning of a SMLE brass stock disc with "A" stamped at 12:00 and "276" stamped at 5:00. One website indicated that the "A" stands for the Argyll and Sutherland Highlanders -- anyone care to corroborate or dispute? What about the numbers? I asked this question in an earlier post, but it was buried with other questions and didn't get very many responses. Thought I'd try again -- this time making it a single thread. Thanks.