What info I could find on the Italian marks are that it was proofed at a company named Gardone & Brescia, with their marks for "definitive proof" and "Finish proof", but nothing about pressures, or loads or whatever. The roman numerals might indicate the barrels were made in 1960? The barrel marks look to indicate the barrels are 20 gauge and that they narrow down .5mm (.02 inch). If I'm right it looks like the gun was made into a skeet gun????
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