I have QQ plates on my 1985 Ranger. I did some investigating, and found out that, not officially mind you, that the QQ at the start of the tag actually stands for a human action:

This "action" would be a pair of eyes ogling at the antique car. Historic plates was started here in Jersey by a well know and famious packard restorer, whom got the QQ tags passed. I am of the understanding that the QQ on the tags are his idea of a pair of eyes "Gauking" (spelling) at the antique or classic car.

Interesting...

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1985 A very good year. Made in the USA, that's why it's running today!. It's a antique, although some people don't think it's old enough to be a "Antique"..