Webley Mk VI
.455 Webley Mk II
Webley produced revolvers from 1887 with the Mk I, ending with the Mk VI introduced in 1915. During the first world war, Britain adopted the Mk VI as their standard sidearm because earlier models could not be supplied in sufficient numbers.
The Mk VI had a 6 inch barrel and stood up well under harsh and muddy conditions, and was in service until 1963. It was reissued in World War II, despite not being the official service pistol, because of the critical shortage of pistols.