Great! Never heard of this mister Hoen... What I'm surprised of is that this car still has got the old type of license plate (B-xxxxx, from the province Friesland). Since 1951 there was a new license plate system, and as far as I know the last provincial plates were used in early 1956 (e.g. there are some pictures of the very first Citroën DS19 in Holland with these plates).