As a non-American, I don’t even understand today what that means. (And the website linked to isn’t loading, so I don’t have the context from that.)
replyLicense plates vary between countries but this description should be recognisable to most of the world.
replyWe use "AA AA 1234" or variations of that, so the examples did not register as license plates at all. Interesting.
replyRegardless of the content, what other 50x11cm mass produced metal signs are there? I was thinking street name signs, before reading the examples.
replyThe comment described them as made out of plastic, while license plates here are usually made from aluminum, so I was thinking more along the lines of some kind of packaging.
replyI believe those are car license plate numbers.
replyBritish ones of various vintage, with RFS 131Y the oldest of those, from 1983.
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