Eley Box Codes

Can anybody decode Eley box code EO MM X ???

Many thanks!!!

As far as I can tell from IAA Journal Issue 449, May/June 2006, Page 38, the code EO MM X should stand for 29 (EO) 11 (MM) 20 (X) which would be the 19th of November 1920. If that is the code on the Eley 9mm box in question, and I am reading the IAA Journal correctly, that would put the manufacture of the Eley 9mm Para cartridge right in the years that I postulated might be the spread of years of manufacture of this ammunition. If we are talking about something else here, then I will go back to the drawing board!

Sure sounds like a 1920s box!!! I’ll dig out the codes and make a copy.