if you look for the year a new revolver model came on the market you don't get the story complete.
a colt peacemaker coming out in 1873 was an expensive toy not everyone could afford then. mayny people were still using older cap and ball revolver still into the 1880s or 1890s because they dont had the money for such an quality gun.
the webley revolver was probably an equal expensive gentleman pistol comon people don't had the money then. in europe including the uk there was the flood of cheap made belgian revolvers, most time pinfire, for the masses.