I've only ever owned one Guisval model, a 1/43 Mitsubishi Montero/Pajero rally car. Unfortunately it was absolutely horrible! I bought it sealed in a blister pack (from eBay) so brand new - or at least unused/untouched. The white paint was extremely uneven, some parts on the lower half of the body wasn't covered at all, the paint had run. There was excess 'flash' on both metal and plastic parts. The all-important decals (this was a Dakar-rally var, remember) were crude (letters smeared and inlegible) and the decals themselves were cracking up badly.
I tried to sell it on, but every photo was a disaster, no matter what angle I used, so nobody was interested. In the end I practically gave it away for free.
Why am I saying this? What's the point? My point is, that judging by the truck photos in this thread and some other vintage Guisval-models I've seen on eBay, this used to be a proud company, a maker of quality toys, but at some point things must have gone drastically downhill for them. To be fair, this happened to other companies as well (some more than others), but nevertheless it saddens me to see such a decline.
Because I've only ever seen this one model in real life, I may be jumping to conclusions - my car could have been a one-off fluke disaster, but...? It's also possible that standards have improved since then, the year of issue is unknown, but the model represented a real car from the 2004 Granada-Dakar rally, so it was pretty recent.
It would be quite interesting if somebody had one or more good quality recent Guisval models to help prove me wrong, but I know this would probably not be the right tread for that.