~~~ thinking they're European and not a personal set since there are more sizes, shapes and denominations that I have ever seen on a personal set.

I am only going after the plaques in the series and recently picked this one up which is in excellent condition and, even better; the serial number is 16...

It is 64 x 40 mm and blue. Strangely, almost the same exact size of the 250 oval seen below.