Popular Science, June 1939
Here we have a piece on stop motion animation. The piece is more or less entirely silent on what it is actually about. However, Thunderbean Animation's new DVD "Stop Motion Marvels" contains a later cartoon with the hedgehog character in it, which lets me know the character is named Mecki, and the maker was named Gebruder Diehl.
Most of the material I can find on Diehl is not in English, and I am uncertain exactly when the pictured film would have come out; my assumption was it was The Hare and The Hedgehog, but I can see dates from 1937, 1938 and 1939 for the release of that film. Perhaps it was released in 1939 in the US (in what form, I don't know; I can't find a release notice in an online search of BoxOffice); not much of a publicity machine if they can't even associate the name of the cartoon with the piece.
You can see a non-English documentary on Diehl at http://www.youtube.com/watch?v=ElFaAdmKqyY and find many links on the side to his work.