Historical Significance and Tactical Role

The Lewis gun was a light machine gun that gave infantry units a portable source of automatic firepower when heavier machine guns were often tied to fixed positions. It was issued to British, Canadian, and other Commonwealth troops in the summer of 1915, providing immediate fire support that could be carried forward during an attack.

As the war progressed, the British Army developed specialized tactics for Lewis gun teams, and issue expanded to “two per platoon by the end of the war.” Its portability made it useful for local support in attack and defence, and one of its most important battlefield tasks was the neutralization of enemy machine-gun nests—often with the assistance of rifle grenadiers. The Lewis was also used to arm aircraft and (briefly) tanks.

By late 1916—the likely year this gun was made — Canadian units were rapidly increasing their Lewis Gun allotment to counter the firepower of the German MG08/15.

In the Second World War, the Lewis gun, because of its accuracy, was given to the merchant marine to mount on ship’s railings for anti-submarine and anti-aircraft fire.

Manufacturing and Industrial Origin

Although Colonel Isaac Newton Lewis set up a company in Belgium in 1913, the first serious production of Lewis guns for wartime needs was undertaken by BSA Ltd in Birmingham, with large orders placed as the rapidly expanding British Army struggled to meet demand with Vickers production alone.

This artifact’s receiver is stamped “Lewis Auto. Gun Mod. 1914 – Pat.” and carries the maker line “Manufactured by The Birmingham Small Arms Co Ltd | ENGLAND | for | Armes Automatiques Lewis | BELGIUM,” consistent with BSA production and the Armes Automatiques Lewis rights structure.

Physical Description and Technical Design

This Lewis is chambered in .303 British and is a gas-operated, fully automatic weapon. It is instantly recognizable by its top-mounted pan magazine and its distinctive cooling system: a fixed barrel surrounded by an aluminum radiator enclosed inside a tubular barrel jacket that is open at both ends. When fired, the muzzle blast draws air through the jacket from rear to front, providing forced-air cooling across the radiator fins.

The Lewis operates from an open bolt and uses a rotating bolt locking system driven by a gas piston. The magazine is mechanically indexed by the gun’s operating parts, advancing one position per firing cycle to feed the next round.

Operational Use and Magazines

In land service, the Lewis is most often associated with the 47-round pan magazine. Larger capacity pan magazines were also produced for air-service use to reduce the need for frequent magazine changes in a moving aircraft environment.

This artifact includes a pan magazine marked for .303 Mk VI & Mk VII ammunition (British cartridge “marks” used to identify specific standard ball loadings).

Industrial Origin and Manufacturing

The receiver markings on this gun identify it as a BSA (Birmingham Small Arms Company) production weapon made under the Armes Automatique Lewis (Belgium) commercial/rights structure. The stamped maker line is part of what makes this artifact especially valuable for interpretation: it ties the physical object directly to the international licensing and mass-production system that put Lewis guns into wartime service at scale.

Markings, Condition, and Associated Equipment (Artifact-Specific)

• Receiver marking includes: “LEWIS AUTO GUN – MOD. 1914 – PAT.”

• Maker line includes: “Manufactured by The Birmingham Small Arms Co … England … for Armes Automatique Lewis … Belgium.”

• Serial numbers (as recorded): barrel 23253; bolt 5038B

• Marked: “Birmingham England model 253A126”

• Mount collar (as photographed): “MOUNT FIELD / .303 LEWIS GUN / MARK II” (this is the mount/collar mark)

• Disabled and inspected: action cannot be cocked; part of the magazine has been removed.

• Displayed with a green metal case (approx. 30 in × 8 in) embossed “C298 CAN TSC/C1943” and a canvas magazine carrier.

Technical Specifications