Wikipedia
Vickers–Berthier
The Vickers–Berthier (VB) light machine gun manufactured by Vickers-Armstrong was based on a French design of just before World War I intended for use on aircraft. In 1925 Vickers in Britain purchased licence rights for production in their Crayford factory, and as a replacement for the Lewis Gun. It was an alternative to the water-cooled Vickers machine gun of same manufacture. The weapon used a similar gas and tipping bolt mechanism to the Bren gun, and also had a removable barrel, and was air-cooled like the Bren. It was adopted by the Indian Army in 1933.