18/01/1956 New percussion spring adaptable to swing revolvers
Patent for registration of utility model Nº 48.976
https://armia-eibar.eus/en/research/digital-archive/olave-solozabal-y-cia---el-casco/arms/patentes-originales-de-el-casco/patente-no48.976
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18/01/1956 New percussion spring adaptable to swing revolvers
Patent for registration of utility model Nº 48.976
