Professor Balthazar

On Friday I got my stamp order from Croatia.

This is one stamp I ordered:

50 years Professor Balthazar (issued 03-05-2018)
Professor Balthazar is the main character of a Croatian animated television series for children. He is an old inventor, who solves all problems of his fellow citizens with the help of his magic machine. In total 59 episodes were produced with Professor Balthazar between 1968 and 1977.

I also bought the FDC of this stamp.