Yes, there is a system!

The higher the characters are in the alfabet and the same for the numbers the younger the vehicle is.

A car with license 45-AA-AA is way younger then a car with this license: 43-ZZ-ZZ

And that's how it works.

For trucks, motors, trailers/caravans (total weight above 750kg) and company vehicles we have different starting codes. For example motorbikes, they start with an M, so: MA-AA-00 and the higher in the alfabet the letters go and same for the number, the younger the bike is (if it isn't imported). And that is the registration date, for example a showroomcar can be older (a year for example) then the license.

Here you can see the newest license plate:
https://www.rdw.nl/Ovi/Paginas/Default.aspx

So if you now which plates go with what year you can tell how long the car is in the Netherlands. And most of the time how old it is.

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