Taliaferro art?

Following the post about the Barks drawing that wasn't by Barks here's another example of art that isn't what it's supposed to be. It was sold a few years ago by Illustration House in New York. They sold this as a Donald Duck Sunday by Al Taliaferro. However, if you take a closer look you'll notice that both the date and the copyright tag is missing from the art. And if you compare this to the published version you'll notice that the lines doesn't match.
So is this a forgery? Most likely not.
I believe that this piece might have been done in the forties as a practice or a test by someone.
Maybe someone at the studio aspiering to break into the comic strip department or a freelancer having this as a sample of his talents when he applied for job. The only thing that's actually wrong with this piece is that it was sold as an authentic sunday page. Probably for a lot of bucks. I just hope the collecctor got his money back.

Do you know of any other examples like this one or the Barks piece mentioned earlier? Don't hesitate to let me know!