The stock is wood with a heavy rifle butt, steel barrel and magazine housed on the left side of the weapon. The magazine holds 32 cartridges. It is fitted with adjustable sights, 100-600 yards. Blowback, automatic action. The calibre is 9mm Parabellum. It is stamped 'LANCHESTER MK 1* SA M619 5230' and stamped with an anchor. The original magazine missing. Designed by George Herbert Lanchester and manufactured by the Sterling Engineering Company, the Lanchester submachine gun was produced exclusively for the Navy from 1941. It was a copy of the German MP28/II with modifications.Sterling Engineering Co.
