The weapon number is 651, there is not always correlation between how many guns there were and the unit - close but not exact.
I believe that the five digit numbering was them continuing their previous commercial numbering from before and during WW1 - and thus you see commercial guns (5-digit) and military marked ones (4-digit with or without suffix) at the same time period. Later it was all military style marked, except for some contract guns.
|