Barks items (010428), US 39 cover sketch

[Daniel van Eijmeren]

I almost overlooked this one, thinking it was only the comic book.
Description is by the seller.

Has someone here seen this cover sketch before? Has it ever been published?

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#1138611620
carl barks cover art uncle scrooge 39
http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=1138611620

Seller: Original Carl Barks Art. premilary cover sketch on paper 
( a few light folds/creases ) page condition okay. approx size 10"x 8".
drawn by carl barks 1955. signed bottom, also stamped walt disney 
production. used as cover for uncle scrooge number 39. was office 
file copy. 
[...]
also have one other, will be listing later. 

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Best wishes,

--- Daniel