The postage is from the Netherlands and the postmark is in Dutch.
Snow White expert, Nunziante Valoroso, believes the artwork appears to be that of Marco Rota, a Topolino magazine artist that continues even to this day to paint covers for Disney comics, as well as being the author of several stories with Mickey and Donald.
In another postcard, we see the same illustration, sans the plastic eyes.
Here's a different Dopey card with wiggly eyes. Postmarked 1973.
Other dwarfs were produced too like this Bashful. Postmarked 1975.
See several Snow White postcards published by Grafiche Biondetti in the 1960s in an earlier Archive entry.