One thing regarding the W Berrie articlenumber on this.
W Berrie sold these as seasonal figurines.
And they used the same articlenumber on all the lightblue graduationsmurfs: 6560.
In 1981 they sold the lightblue graduationsmurf (20130).
In 1982 they added the lightblue graduationsmurfette to this seasonal graduation figurines.
And in 1984 also the #1 grad smurf.
But like with the easter, santa and thanksgiving they used the same articlenumber on some of them.