Here's what the owner wrote on the CAF site:
"This belonged to a California artist who sold at Art Shows along with Carl and Gare Barks. After becoming friends, Carl gave him some items-----including a 1970 landscape and this piece. When I saw it displayed on his wall, I asked if he would sell it, and he responded with a price. I accepted without any attempt to negotiate."
And I could go on.
The more I look at it the more differences I see. Even the line weight doesn't match the published cover. Enlarge the image of the ink drawing and compare to your own copy of FC 275 and try to spot the differences.
So, unfortunately this is not the real deal. The piece is still on CAF and can be found by clicking HERE.