Did Barks originate the lucky dime?

[Daniel van Eijmeren]

Just a few questions: 

Was Barks the creator of Scrooge's *lucky* dime?
In which story does the lucky dime appear for the first time?

I've always thought that Barks was the creator, but maybe it came 
from someone else? And when did artists other than the creator take 
over this concept? Is there someone who knows more about the history 
of the lucky dime? 

BTW. I *don't* mean the first dime as coin, which indeed was created 
by Barks and made its debut in the watertank money bin story (OS 495).
I mean the *luck* that is said to be coming from the dime.

--- Daniël