Inert 57mm shell casing, used in the AZP S-60 by the Soviet Union. This 57x347mm casing is made of brass. This round is in good condition. The AZP S-60 is a Soviet towed, road-transportable, short to medium-range anti-aircraft gun from the 1950’s. The gun was extensively used in Warsaw Pact, Middle Eastern and South-East Asian countries.