Castor oil vs. cod liver oil

[Daniel van Eijmeren]

Someone in private wrote, in part: 

"...I'm in search of an old Donald Duck story (published in Greece in 
"GELIO KAI CHARA", no 45 I believe, some forty years ago),in which 
Donald takes over his Uncle's fortune, because Scrooge is believed 
dead, in a zeppelin crush. I follow the greek "KOMIX" magazine since 
issue no 1, but I haven' t found that story, [...]"

My advice was to subscribe to DCML. But now I'm curious, myself. 
Does anyone recognize this story? 

--- Daniël