The Swiss came up with the old 7.5x55 Swiss loading, the pre-GP-11 type. Then the Belgians modded that into the 7.65x54 and the Germans narrowed it into 7.92x57 I, which the Spanish modded into 7x57. I think. As best I remember.
Most think of the 7,65x53(or 54) as an Argentine developement from 1891.
It was actually developed for a Belgian M1889, that had an extraordinarily long service life IIRC.
The Argentines just got more press, while the belgians faded into history.
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