GEBRÜDER ULMANN.
image by Klaus-Michael Schneider, 6 April 2009
The 1956 source describes the diamond frame as celestial blue, but Rosanoski’s rendering follows the darker blue of the company logo. Flaggen auf dem Rhein confirms the black letters. Mitchell’s funnel is taken to be Fisser & van Doornum’s F35 rather than independent evidence of a new Ulmann design.