21/11/1922 Improvements in revolvers called oscillators
Patent of invention Nº 83.516
https://armia-eibar.eus/en/research/digital-archive/olave-solozabal-y-cia---el-casco/arms/patentes-originales-de-el-casco/patente-no83.516
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21/11/1922 Improvements in revolvers called oscillators
Patent of invention Nº 83.516
