I have 40 different stamps of the green one & quite a few of the other 2 with sports, birds on them in different colors.
I have the Liberty Stamp Manage 2016 data base and they do not show the green ones at all and yet the orange is shown as Scott #2497 and the blue one is Scott #2496. However - in the Scott catalogue I can't find anything like those number either under Ajman or United Arab Emerites? Could these all be cinderallas and Liberty has listed them in error under Scott #s.
I can't ID them, but they're both part of 2 different sheets: one military men and one soccer. These are nearly ubiquitous in various packets and WW kiloware. I occasionally see the entire sheets; but mostly it's singles. Don't know their catalogue numbers.
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They are not listed in Scott, although if you have an older Scott that still had the "For the Record" section, you might find some of them listed (with no catalog number assigned).
Issued in 1972, they come in sheets of 25. For mint, my 2006 Michel shows a value of 3.60 Euros. Used (canceled to order), they have no value. I doubt the values have changed.