A,
* The large eagle/63 on the magazine base leads me to believe this mag was originally issued with a 42 Code, 1939 chamber dated Mauser P.08.
* When you field strip this pistol to check the firing pin number, the trigger on the L/Side and the holdopen at the inside top of the mag well should also bear the last 2 digits (90) of the S/Number. The rear toggle pin linking the back of the receiver to the rear toggle link should also be number matched on the left side with the last 2 digits.
* Nice looking example.
* Out of curiosity, does a numeral or numerals appear on the inside of the side plate?
Respectfully,
Bob