Belgian cars had specific VIN tags.
yes, but look at the VIN tag from the flicker pictures
http://www.flickr.com/photos/sayther/5670121105/in/set-72157626485152233/lightbox/
In the fotos for this car the VIN numbers (2211xxx) are not stamped on the tag (like in the foto you posted), they are engraved.
I wrote to the seller asking for a photo of the VIN stamping on the firewall/a-pillar, they replied that there was already a foto of the VIN posted. SO...I wrote back saying not that one, on the firewall there is a second stamping in the sheetmetal. The seller (or representative) wrote back saying they couldn't find it.
Sigh