regarding the years of these smurfs I found this Picture also of Another W Berrie christmas ornaments display.
As you remember I thought that some of these smurfs were sold earlier than the other ones.
My guess is this:
In Christmas 1981 this display was used. Then with only 6 corded smurfs for sale.
The years could be wrong so it could be 6 smurfs sold for Christmas 1982?
Anyway I think only 6 of them were sold the first year and then they added 6 more for the next years Christmas.
BUT I do not Think it was only the Hongkongmarked ones sold the first year. My guess is that the The first 6 also were Portugalmarked ones and they added Hongkongmarked ones later. just like they added Chinamarked ones in the end of production.
That also goes well with the markings.
So the first year they only sold 6 smurfs and used this display.