Carcano charger "B-17"

What happened to the usual capotecnici initials on the left? I looked under high magnification and I could not find any traces of the stamp. Besides a bit of white paint on the side, there is nothing unusual about this highly magnetic charger.

munizioni - Le lastrine di caricamento (Clip) della 6,5 Carcano

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Does it mean it is supposed to have “S.B” on the left and it did not stamp for some reason?

B = Bologna + date 1917 SB for SIGMA Société Italian Générale per munizion & armi (Bologne)
Amic, Dan