Longest undisputed reign. . .

[cpinkboots]

So who has held both unofficial and official titles for the longest stints? Who are the world's most dominant undisputed champs?

[kevinmce]

As for the official title, Italy held it from 1934 to 1950, the duration of their reign prolonged by the intervention of a World War.

The longest UFWC reign was Scotland's tenure from 13 March 1880 to 17 March 1888 (2923 days), encompassing 21 matches.