RUDOLF A. OETKER.
image by Klaus-Michael Schneider, 18 May 2007; observed 16 March 2007
The flag is white over red divided per bend sinister, with black serifed RAO letters. Schneider observed it over the Hamburg office on 16 March 2007. Rosanoski combines flag and funnel evidence from website photographs but cautions that subsidiary-operated ships may fly the flag for the group, and the illustrated combination may never have been used directly under the Oetker name.
Mitchell supplies this funnel, although his small ship drawings appear to show the plain O283 funnel and may simply omit finer detail.