PPSh-41 - Identify Manufacturer?

[LanceS4803]

I'm looking at a PPSh-41 with a manufacturer's marking of "C", indicating Scetmach in Moscow. Date appears to be 1941.
However, to the right of the "C" is an "A", with the font being just a little bit smaller.

Does anyone know what this additional marking means?

[BrodieBartfast]

Might have been re-stamped as part of the refurb process. I have an Izhevsk Mosin-Nagant with the Tula star stamped underneath the original markings. My Mosin was given a new serial number, though.
This also looks very neatly done, as opposed to what I'm looking at here.



B.B.

[LanceS4803]

ttt
Anyone else?