These are the variationchanges made by Bully that are almost 100% sure when comparing markings and pictures. Let me know if you disagree.!
Be prepared for a lot of red!!
Brainy-red glasses
Astro- red zipper
Angry- red gum
Spy- red inside cape
Drummer- red sticks
Lute- red lute
Judge- red robe
Sleepwalker- red pompom
Poet- red feather
Smurfette- red shoes ( only removed emblem variation)
And at last a yellow one. Crying got a yellow hanky!!
AND one more thing. The catalogue also shows the schleich Gardener. That one is the only one shown I have not seen on any poster. BUT that one goes well with the years for the others and are also the next one in the articlenumber serie Schleich copied from Bully!!
So you should add gardener to the list of smurfs sold by Bully in 1977 with number 1010/528!!