Who made all the P.08 magazines?

[LU1900]

The sheet metal body comes from a plate folded at the rear and welded in the middle of the back, at the same time a thin plate is in place at the back inside to consolidate the whole .
The bottom is also different
Picture from Kri1942 collection about the new in package never open , other from my own collec.
The picture from the inside ,you can guess the two thicknesses of the back