Newbie ?: Data Plate?
 

I read the FAQs and know the four locations mentioned. But what about the black plate riveted to the side of the driver's side headlight housing in the front trunk? On my '72, it has this info:

S.A ANC. Etablissements D'ieteren Freres N.V.
Bruxelles Brussel

Marque Merk PVA
VW/Porsche 40320

Type Chassis
47 4722909718

PMA/HTG PMA-Train/HTG-Sleep
1220 1220

Do all have this, and can anyone shed some light on what these reference?