And who knows that designer, Kaus ?
.https://www.technikmuseum.findbuch....76bf763dac7e0c7e1e1e3c6ece1e1e3eae4e4c739f13f
also that was unknown to me, Metschler & Pöppel ?.
That site is mostly empty or has dead links.
MMW (Mitteldeutsche Metallwerke) built in 1944 the Kalkert Ka 430 .
https://www.secretprojects.co.uk/threads/kalkert-ka-430-cargo-glider.5359/
(Sorry , Google traduction ) After the war , consultant , 1953 technical manager at Waggonfabrik Crédé , 1957 at BMW (saved by him) , 1960 at Ruhrstahl , around 1967 retired , died on the 26-7-1977 .What happened to Albert Kalkert after WW2?
Otto Onigkeit (Magdeburg) built before the first world War four monoplanes .Mr. Otto Onigkeit designed aircraft after WWI ?.
Your picture shows a sailplane which could be a Berlin Segelflugverein Luftikus .here is a motorglider,designed by L. Otto.
Here are two photos & a data table from "Svenska Flygplan" by Lennart Andersson.From generic sources ...
The Göken (Cuckoo) was designed in 1930-31 by the German flight instructor, Willy Pelzner (01 June 1900-23 July 1977). The Göken was assembled at Pelzner's flying school at Hammars Backar (east of Ystad) - by then, his original partner, Greve Douglas Hamilton had departed. The open framework fuselage was constructed from welded steel tubing ... alas, no other details.
In 1931, Pelzner formed the Flygtekniska Försöksinstitutet Aeolus (Aeronautical Experimental Institute Aeolus) with Lennart Hemminger. Together, they designed the TP 171 light biplane. Structure was veneer-covered wooden wings and a fabric-covered, welded steel-tube fuselage. Power was by a 24 hp Hirth 2-stroke engine.
Bernhard Scheller from Celle, S.IV/31 "Jörg"