Stacked initials in Schraffierte Glass-Antiqua (“Shaded Glass Roman”, Genzsch & Heyse, 1913) paired with Genzsch-Kursiv (the italic companion to Genzsch-Antiqua, 1907) for an ad in Gebrauchsgraphik Vol. 3, No. 4 from April 1926.
Bromograph is the trade name of a machine “used for multiple developing and printing of photographs from one negative onto a continous roll of paper” [Museum of Applied Arts & Sciences, CC BY-NC-ND]. The Bromograph-Aktiengesellschaft was located at Alte Jakobstraße 9 in Berlin-Kreuzberg. Paul Drews GmbH is another manufacturer of photographic reproduction machines (or the successor?) at the same address, mentioned in 1927, 1932 and 1941.