O. GARMS & SOHN.
image by Klaus-Michael Schneider, 11 April 2009
Mitchell labels the funnel H. Garms & Sohne. Schneider estimates the flag’s stripe proportions as 2:1:1:12:1:1:2, but Rosanoski states that the cited 1957 source actually gives 3:1:1:5:1:1:3, matching his illustration.