Hi Christine,
I think so, assuming there were no transcription errors:
68700 Cernay - is the postcode for the Eriba factory in Cernay, Haut-Rhin, Frace - just over the border from Germany...
Weight:
690 kg is the empty weight
850 kg is the maximum allowed weight
giving you a payload of 140 kg for a gas bottle, clothes, awning, etc
75 kg is the maximum nose-weight (downwards force) for the tow-coupling
Age:
59 36 01
The 59 part means year 9 from decade 5 (which is 1980 + 9) or 1989
So if you have found the right code - then it's a 1989 Pan - and if you don't think that's correct, look on the draw-bar around where the gas bottle pod sits and look for the ALKO data plate - that should have something like BJ 1988 or BJ 1989. BJ = Build year (in German) and the chassis will have been built a few months before the caravan - so could state 1988 or 1989
Robert