Original British WWII Polston Oerlikon 20mm Cannon Barrel Hand Select:Yes "Naval and Military Gunsighting

"Naval and Military Gunsighting

This was the original designation of the Martini-Henry MkIV "Long Lever" before they were all converted to

Adopted on 21st February 1940 by General order # HM 40

Often worn in pairs the second was used like a cravat to keep the cold from the throat and neck areas

The Mark V was used until the late-1980s at which point the British replaced all steel helmets with the Mark 6

Original British WWII Polston Oerlikon 20mm Cannon Barrel Hand Select:Yes "Naval and Military GunsightingOriginal Item: 20mm Polston Oerlikon Barrel cal 20x 110RB. Used. Approximately 58 inches long. The Oerlikon 20 mm cannon is a series of autocannons, based on an original designed by Reinhold Becker of Germany, very early in World War I, and widely produced by Oerlikon Contraves and others. Various models of Oerlikon cannon were used during World War II, and they are still in use today During World War I, the German Reinhold Becker developed a 20 mm