Probably one of the most recognised smurfs is Brainy Smurf. There are three genuine colour versions black, red and yellow. Brainy has the Schleich reference number of 20006.
Brainy Smurf was first released in 1969 with black glasses with the markings Schleich emblem under the foot and Peyo (c) on the arm.
Brainy Smurf with yellow glasses was especially released in the UK between 1977 and 1984. It can be found with the markings W.Germany Peyo (c) + mustard paint dot. This version is considered the hardest one to find out of three colour versions.
Most commonly found is the version with the red glasses. This version was produced in West Germany, Portugal and Hong Kong.