The story goes that Argentinaicon wanted 7mm Mausers. But the Germans were heavily involved in the Turkishicon contract and could not deliver enough 7mm barrels. But, they had excess 7.65mm Turk barrels on hand and talked the Argentines into accepting the 7.65mm cartridge. But the arsenal was not available so the commerical factory built the Argentine Mauser. Which also explains the commerical trigger guard on the Argentine M98.
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