Yep...I think you're correct Rach in that the smaller & larger molds were sold with the wheelbarrow (super smurf) & without like the regular smurfs. I am not too sure on the markings though but I think that any Gardeners with "CE" markings came from the playsets but that is something that would need to be checked as I am not sure what year these Gardeners (super & regular) were stopped being made on their own.
The thing is that we buy a lot of smurfs from different places and it's very hard to tell if any Gardeners we bought with the Wheelbarrow actually originally came with the wheelbarrow or was added by someone else along the way. Some of these smurfs have been around for decades and have had more owners than I actually want to know about.
I guess the best thing to do is to try to match the markings on the Wheelbarrow up with the markings on the Gardener smurfs the best you can......and if you or anyone has a spare Hong Kong Wheelbarrow can they please contact me as my one is broken.
Dyar