WW2 British 20mm Aircraft Cannon Casing INERT

This item is an original WW2 British 20mm aircraft cannon casing in inert condition. The casing was designed for use in aircraft-mounted cannons, such as the Hispano-Suiza HS.404, which was widely adopted by the Royal Air Force during the Second World War. Made from brass, this casing measures approximately 20mm in diameter and was intended to house a high-velocity round suitable for engaging both air and ground targets. Markings on the casing typically include manufacturing codes, dates, and inspection stamps, which can provide information on its origin and production year. As an inert item, this casing contains no propellant or primer and is safe for handling and display. Items such as this are valued for their relevance to military aviation history and are often collected for reference, education, or preservation. This casing represents a tangible artifact from the era of large-scale aerial combat in the 1940s.