Quote:
Originally Posted by kurusu
I can think of two reasons.
9x25 Mauser
9x23 Steyr (with the 'Austrian connection" in mind).
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Bingo.
And purely FYI, no offense intended, it's actually 9x22.5 Steyr. That's the factor which prevents using the 9mm(x22.5) Steyr and the 9(x23) Largo/Bergmann cartridges interchangeably.
Another consideration is the original serial number on the barrel/barrel extension, and the serial number range in which it falls.
Alas, C96 collectors generally have to deal with more ambiguity than do Luger collectors.