thank you Pascal,
there is 130K records (kentekens) with a missing data of the first registration in NL and/or date of the first registration ;
the only date information available is [Datum inschrijving voertuig in Nederland]
BUT it is not a part of the dataset m9d7-ebf2. (main gekentekende voertuigen)
my question to #RDW
1. is it possible to include the field [Datum inschrijving voertuig in Nederland]. in m9d7-ebf2 ?
2. how come [Datum eerste toelating] is not registered for so many cars and is it corrected later on?
Another example of a car without the key dates: