Die Heinzelmännchen (The Brownies)

Mainz: Mainzer Verlagsanstalt und Druckerei. unpaginated. Printed color applied cover over cloth spine, entirely in German, black and white and color illustrations throughout by Fritz Baumgarten.
Brownies (elves) took care of all the chores in the town of Cologne while everyone was asleep.
8" x 9 1/2" written in German, wear on cover,