The number 2692399 should represent the van number and therefore the date.

However, using the information drawn from this thread and the link therein to the Forumeribatouring listings, there appears to be a problem.
How to date your Eriba

Both your plate number 2692399 and also 67 61 00 33 suggests that your van was built in 1997. However, looking at your avatar photo of the van, it has the two front windows and an integral gas locker box which points to it being at least a 1999 model.

Randa

I think it is as well Stan so I can't quite see how the numbers say it's a 97.It could possibly be a 1998 model as they phased the intergral locker box in around then but I've not seen a 97 one before. Also it's very early for a yellow colour scheme.
I wonder if the factory plating process takes place before the final registration documents are complied? Perhaps yours was made in late 1997 as the numbers imply and was also one of the first yellow stripes, but showrooms were a little reticent to take on such a bold colour?
Randa

The one thing I do know (Thanks to Jean of Jandi) is that the plating information on many French made Eribas is all over the place.

Our Troll 530 is listed as being a 510 and many slightly later 540s are listed as 555s.

Randa

I agree with him above. I recall somebody a few miles away from me ordering a new 540. It was badged as a 510.

Colin

Later vans generally have higher payloads. The guide I follow is counting the wheel studs/bolts. On Tritons and Trolls 4 usually means 1000kg max whilst 5 means 1200kg. Over the last year or so 5 studs could mean 1300 or even 1400kg, just to confuse you even further.

Colin

Do not be tempted to go mad and have tyres fitted with a higher load rating than present. You should not aim to exceed your max load by much more than 10%, as to do so would mean loosing some of the suspension properties that the tyres provide.

Colin

Same size as our Troll Stan. They were the size fitted from new but 530 kg load x 2 tyres = 1060 kgs which is only 6% above the max van weight.

Most people recommend having tyres with load ratings10% above the max van weight but because the next tyre load rating available at most UK outlets is a van tyre and therefore around 1200kg rated, I have resisted changing up for the reasons that Colin gives above. If the tyres supplied when new were good enough then I will not change.

Another important point when ordering tyres, get the supplier to check the max tyre pressure it'll take because Hymer/Eriba now recommend a 3 bar tyre pressure and tyres of this size, although normally guaranteed up to 3bar, are sometimes available at less, even as low as 2.5bar. I run our tyres at 40psi (2.75bar) to keep them below the max as tyre pressures expand when warm. I assume that the max tyre pressure when warm is at speeds of 118mph (the T rating) and we only ever reach those speeds when we're racing with campervans

Randa