No, do not get the plates thing referred too.
I assumed it was in Germany as that is what was said. The original ad is not there so I have few clues. However taking what I said earlier about three going to one Jan van Stratton, then one going to Switzerland, you are left with two cars. We are now told there are two 'cars' for sale, which would sound about right. Add to that we have a large green gate, not unlike that fronting Jan's house. I would suggest that he is the seller. Sneek is in Friesland. Jan is/was a navigator on the Rhine barges. So he will know ship builders and there are yards round there.
Jan and Nellie had a few Coronets/Powerdrive too. Bought earlier still, one at a Burford. He used to do this. Sudden bursts of acquisition of some car that took his imagination. He was into Velorex when I delivered the Bonds on the way to a German jumble. I had a job to keep up with him. Velorex are, or can be, pretty quick. Lian van den Bosse, a trader, got the bug from Jan, Arie and Rolufe and I had a pretty regular run up there for a few years. Its where the Inter came from, amongst other rarities. Happy days.