Originally Posted by
goldox
Thanx Dave, tried that, the original photo was very old and faded so the scan is not much worse than the original, honestly!
I take your point about the quality of the original, but nevertheless the small size of the JPEG and the amount of dithering make it very difficult to discern any detail.
If it was possible to use a grayscale scanner at 600 (or preferably 1200) dpi you would almost certainly get a more usable image - probably too big to upload to PPRuNe in its entirety, but you could crop around the individual aircraft.
Even if the registrations were still hard to make out, the colour schemes (albeit in B&W) might give a clue. For example there's a distinctive logo on the Aztec's tail that rings a vague bell, but with more than 300 of them on the UK register over the years some more clues would be a great help.