Original Items. Only One Lot Available. This is a great lot of five Finnish 20mm shells for either the 20 ITK 40 VKT Anti-Aircraft Gun or the Lahti L-39 Anti-Tank gun. All five shells are 1941 dated and display well together. Like all deactivated ordnance, these rounds are Not Available for Export.

The shells are all similar but have small differences in their construction. All rounds have great markings on the bottom of the round and some have markings on the projectile. They are all roughly 9 ½” with some being a little shorter or longer.

A great lot of rounds ready for further research and display.

The 20 ItK 40 VKT is a dual anti-aircraft gun designed by Aimo Lahti. The gun barrels and mechanisms are based on the L-39 anti-tank rifle converted from semi-automatic to full automatic fire and with the stock and barrel shroud removed. A prototype L-39 anti-aircraft gun was completed just before the Winter War, but Lahti made some improvements to the design and the mass-production version was designated L-40. Airforce headquarters ordered a series of 50 guns from Valtion Kivääritehdas (VKT, State Rifle Factory) in January 1940 and a further 120 guns in June 1941. Production was delayed, however, and the first guns were finished only in 1943. Of the total number of 174 guns, 155 were produced in 1943 and 19 in 1944. The guns were distributed to units in small batches soon after they were completed.

Unlike the L-39 anti-tank rifle, weapons in the 20 ItK 40 VKT are designed for full-automatic fire and so do not suffer from the similar structural weaknesses as the full-automatic conversion L-39/44 anti-aircraft rifles. The rate of fire for the gun is adjustable, with a maximum cyclic rate of 2 × 700 rounds per minute, and a more commonly used rate of 2 × 360 rounds per minute. The gun is loaded from 20 round magazines, with an empty weight of 5.6 kg and 11–12 kg full, depending on the type of ammunition. The 20×138B Long Solothurn cartridge used in 20 ItK 40 VKT was also used in the L-39 anti-tank rifle as well as the other 20 mm anti-aircraft guns, the 20 ITK 30 and 20 ITK 35, used by field army units. The gun sight, designed by Osmo Niskanen and manufactured by Strömberg company, was not entirely satisfactory and was more complicated to use than the sight in the German 20 ITK 30. The gun trailer was also problematic, as it was rather frail and offered a ground clearance of only 20 cm. Thus the towing speed was limited to 30–40 km/h and the mobility of the gun was limited. Equipment used with the gun included spare magazines with a transport case, gun tarpaulin, a transport case for the gun sight and a toolkit.