Airplane Animation Cel Help!

This is a scan of an animation cel I purchased about 20 years ago, dating from the 1940s. I've asked a great many animation experts including Jerry Beck what film this animated airplane is from and I have literally stumped the panel.

I can tell you that it is NOT from Tex Avery's "Little Johnny Jet", nor is it from Disney's "Pedro" from "Saludos Amigos".

I have been told that it is probably from a Walter Lantz cartoon, but I have no idea if this is correct or if correct, what title?

I own quite a few cartoon collections and have yet to find a scene with this airplane. Please help!!!