BRIMO REDERIJ.

The flag is green with a white diamond extending to the edges and bearing a black “B”. The funnel is yellow with a panel reproducing the flag.

Multiple exact and variant searches did not locate useful independent evidence. Results about unrelated Brimo businesses or a U.S. official named Brimo were rejected. No alternative country or identity is guessed. Rosanoski gives Brimo Rederij of Delfzijl with a Brown 1978 flag reference; the local text is coherent.