The Farmer's Clever Daughter
Wie heiratet man einen König (original)
A farmer receives land from the king and discovers a buried golden mortar. He decides to give it to the king out of gratitude, but his clever daughter warns him that the king will surely want him to bring a corresponding pestle as well. When the king throws the farmer into jail for fraud, he bemoans the fact that he did not listen to his daughter.
Starring Cox Habbema, Eberhard Esche, Sigurd Schulz, Hannes Fischer, Peter Dommisch, Jürgen Holtz, Käthe Reichel, Gerd E. Schäfer, Lilo Grahn, Dieter Mann
It's a family and fantasy movie, and has a rating of 6.8 out of 10 from Imdb which is usually fine for this kind of movie.
Watch it here
Not found streaming from Spain.