I've looked at the diaries produced by Eagle, Girl & Swift before, but in separate posts, so I thought I might usefully pull that information together into a single post.
Eagle
Diaries were produced for at least 1951-63. No diary would have been produced for 1950 (Eagle launched in mid-April so that would have made no sense). I have copies of diaries for the following years...1951-4 & 1957-63, so I'm just missing 1955 & 1956 (and any produced from 1964 onwards).
Diaries typically look like this...
Only example I've ever seen - no idea how many were produced. This is for 1956.
Swift
Only example I've ever seen - no idea how many were produced
Judge Dredd diaries
For the year 2000...
and these images (all swiped from here) of a numbered limited edition version of the year 2000 diary as well