BAGGER-, BUGSIER-UND BERGUNGSREEDEREI GMBH.

The flag follows the blue–red–blue DSR design, with a white “B” surrounded by a white cogwheel at the centre.

Lexikon der Seefahrt instead shows a solid white cogwheel containing a blue ring around a blue “B”.

FOTW labels these renderings “BBB variant flag” and “BBB bright blue flag”.