Good question. I assume this is the 4 digit number on the sidewall. One number is 4605 and the other 3406. I think both tyres were only used as replacements as they came on brand new minilite wheels - 6 of which came with the car when I bought it (4 on the car and 2 spare ). Not sure whether these would be classed now as out of date, but the tyres themselves have good tread and sidewalls.
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