What is the difference between Webley Fosbery revolvers and normal Webley revolvers, and which one is better? - Quora
Webley-Fosbery - Modern Firearms
Webley MkVI and a Webley-Fosbery. Both in .455 caliber. The Fosbery is a semi automatic revolver. The grooves help in the cycling action for the hammer reset. Pretty interesting gun to shoot. :
How a Webley Fosbery works - YouTube
WEBLEY FOSBERY - D16652 - Simpson Ltd
Webley & Scott .455 Self-Loader Pistol: History of Britain's - Guns and Ammo
Zigzag failure: automatic revolver "Vebley-Fosbury" and others with it