These are manufacturers samples (Utsch in Germany I believe) for the 1986 series of plates in Umm Al-Qawain in the UAE.
Although this basic design was used, all these plates have something wrong with them. All the plates have the same combination of numerals 3 1 8 2 and 7 in either western or Arabic script.
The red one should have the number in western script.
The second one should be red.
The blue one should have the number in western script.
The last two should be blue and have the number in western script.