Hi John,
these Solido's are really meant to play with, toy wise I mean. That's why sprockets are simplified and tracks are 'a kind of' realistic. Some models are even having the same track.
Many of the models are from the 60's I guess, reissued now. They play a lot with paint work, older issues now in camouflage, or French tanks with German markings (which is historically correct). I think they have US army Shermans, but Free French too with that particular Lorraine cross decal. Some tracks are browned, others silver. Some run well, others are roughly finished.
I have an M10 armoured car, the plastic of the wheels is slowly softening up, very strange. But I do like the range. The Solido DUKW is great I think, would be a nice train load too!
( no, I have no commercial interests or Solido stocks...just like 'em)
Kieffer