Just for reference if anyone wants to know the front cast wheel used on Norge/Breva/Sport models measures seemingly 121mm between the bosses on which the disc spiders fit. 121 seems a bit weird and it may be that my caliper was a bit cocked over when I was measuring it so I'd guess it is in fact 120mm.
How that compares to a GRiSO wheel I'm not sure but I was asked by @Speedfrog to check as he is trying to source a set of alloy wheels for his GRiSO which has spokes.
I and not sure if the wheel dimensions are different between models that use Marzocchi and Showa forks so this will hopefully clear up that confusion. I don't currently have a GRiSO wheel to compare but hopefully Speedfrog will be able to enlighten us on that.
All rear wheels are the same apart from their colour. It's just the front ones we are in a quandary over.