Hi guys,
Yes the Schleich emblem also called the "stickman logo" or "bendyman logo" as Staci correctly pointed out, is one of the earlier Schleich markings. As far as I know, Schleich used this marking before ever adding the word Schleich and then Schleich S or Schleich Germany to the figures. Quite often you can find smurfs where the Schleich Emblem has been removed or covered over for a newer mold and replaced with one of the later markings. Personally, I use them like Tojo, as a good indication of an earlier run and have generally listed them as one of the first variations on Blue Imps.
I do intend to update the markings page on Blue Imps in the near future as those pics are rather old now so I can definitely get better quality pics of the markings and also add a lot more info about them.