7.9 x 45 history

Does somebody knows the history of the 7.9 x 45 ctge ?

No documented history is known except for the Polte drawing Pf6548 of 1939. It was considered a non existing cartridge until recent times when several specimens headstamped P M were found. About 10.000 Polte drawings were made between 1925 and 1942 and specimens of many of these rounds are still unknown.

Thanks Fede

When ther is just a Polte drawing we can indeed doubt.
But when Mauser made also the drawing (dummy, max of the ctge and chmaber) I think we can be sure the ctges were made