Berlin: Photokino Verlag 1931. 195, [13-adds] pages. Plus three 6 x 13 cm mounted stereograms (actual prints) in rear pocket.12mo (4 3/4 x 6 5/8 inches). Printed yellow wrappers with original multi-color dust jacket. Some fading to the spine panel dj, and wear to the head of the spine and dj. Illustrated. Text in German. Very Good / Very Good. Wraps. 
"The Practice of Stereoscopy". Photofreund Bucherei, Band 18. (edited by Fr. W. Frerk). Author's forward is dated 1930, editors forward 1931. Title page notes 1931.
A scarce title with less than a dozen copies in OCLC/Worldcat and none online as we write this.