INERT. This is a Yugoslavian 20mm dummy round for the Zastava Model 55/3 anti-aircraft gun that was developed in Yugoslavia following the purchased the manufacturing licence of the single-barrel Hispano-Suiza HS.804 20mm L/70 anti-aircraft autocannon mounted on the HSS.630-3 towed gun carriage including the 60 round drum magazine. The HS.804 was made by the Crvena Zastava Company and entered production in 1955 as the Zastava 20/1mm M55 single barrelled cannon. The company's engineers began working in the development of a triple-barrelled version; the first prototype was completed and entered production in 1971. The three barrelled version was also fitted to the M55 A4 M1 (BOV 3) armoured vehicle. This is a brass and hard black rubber drill for both the single and triple barrelled guns with a black rubber body and turned brass bases and noses. The bases are headstamped MBA -74 20MM-M55 and have a black hard rubber primer protector. See pages 43 and43 Janes Ammuniton Handblook, 1st Edition 1993 – 4. The price includes UK delivery and no licence is required to possess inert rounds in the UK if retained as part of a collection or display. There are 3 rounds available and the price is per round. O 1920