Wehrmacht Radio instruction book 'Unterrichtsbuch für die Funktechnik im Heere (U. Fu.)' H. Dv. 125. The book was published in 1931 by the "Verlag Offene Worte" from Berlin. The book features 354 pages with a lot of nice high quality photographs and illustrations. The book is in used condition showing some damage to the spine, see photos. Nice book in good used condition!