






Sources agree on a black ring except for Marine News, which gives an undefined white circle. The hammer and mallet are generally black; Massary gives red handles and Lloyd Reedereiflaggen yellowish-brown ones. The small letter is usually upper-case “D” in British sources and lower-case “d” in German sources, Talbot-Booth and US Navy. Some place a horizontal bar beneath it. Lloyd’s 1912 adds dots after the large “B”s; the German cigarette cards instead give two lines below “d” and a dot after it, but no dots after the “B”s. Mathies gives two lines and no dots.
Brown 1958 uses a small “O” instead of “D”, naming Bernard Blumenfeld below the picture but Blumenfeld Reederei in the index.
Massary also assigns B796 to Nordeutsche Kohlen-Kokewerke, but omits the red tool handles in that rendering. Both funnels have a narrow white band separating the flag band from the black base. Lloyd Reedereiflaggen again differs by giving golden-brown handles.
Brown 1943 labels B797 “Bd. Blumenfeld”; Ships & The Sea uses a small “d” on the funnel instead of “D”.
The Esso, Flaggen & Schornsteine and US Navy sources assign B798 to Bd. Blumenfeld GmbH; the Marine News rendering appears in R.S. Fenton’s article.
Rosanoski presumes the lower part of B799’s funnel triband should be black, merging into the base.
B321 is recorded for Erik Blumenfeld.