45 Corbo Exp. and 7.65mm Arias Exp

Hi all

I got these units from a very old collection (it comes from Gonzalo Fernandez’ collection at Montevideo, Uruguay) and unfortunately it was not able to get any information about these 2 units. Not sure if they are indeed experimental or just a “wildcat”.

They looks like an Argentinian experiments but it is just a guest. Any info will be appreciated