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Case identification 79?x540

MT-LB

Well-Known Member
Premium Member
Hello,
would like to get any informations about the caliber and weapon system/s used in this caliber.
Its a new, unfired steelcase - here the measurements
casemouth inside 79mm
caselenght 540mm
rim diameter 117,7nn
rim thickness 7mm

Erik
 

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Possible I.D?

The best match I can find is the 78x545R 76.2mm AK-726 L/55.

During the Second World War the Soviet Navy used the 39-K twin 76.2 mm anti-aircraft mounting, the 55 calibre gun having a vertical sliding block breech. However, the performance of this weapon was not suitable for the post-war environment and in selecting air defence weapons for destroyers and above the Soviet Navy preferred 45, 57 and 100 mm weapons.Developments in aircraft drove a requirement during the early 1950s for a rapid-fire gun supported by a radar fire-control system and in 1954 Factory No 7 (TsKB 7), now the Arsenal Design Bureau, began designing a twin 76.2 mm weapon. Development of the mounting, given the manufacturer's designation ZIF-67, began in 1956. Although installed in the first of the Petya-class frigates in about 1961, development was protracted due to this being the first naval gun to accept proximity fuzes. The system was formally accepted into service on 24 June 1964 as AK-726 with the MR-105 (NATO designation 'Owl Screech'). The first ships commissioned with a full system were the Kashin-class destroyer Ognevoiy, on 31 December 1964 and the Mirka-class frigate Gangutets, on 25 December 1964. Other vessels which received the AK-726-MR-105 systems were the Kiev-class aircraft carriers, Kara-class missile cruisers and Krivak I-class frigates. It was also selected for the Kynda class. In 1970, Western shipyards were marketing a new generation of FACs with greatly enhanced missile and gun armaments, the latter usually the OTO Melara 76/62 Compact and by the end of the year the West German Navy had placed orders

BOCN4663.jpg BOCN-AK-726.jpg
 
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