This 1990 to 2108 will only be a ball park change-over area as in the early days of writing the numbers down, in a few pages of an old work book, I didn't even bother to log anything but the numbers. It was only during the 80's onwards that I started to note other detail. If anyone's got an overstamp OUTSIDE these numbers it'll be interesting. But there you go, those are the dates of WW Mk1, 41 to 42 changeoverInformation
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