W. BOCKSTIEGEL REEDEREI GMBH & CO. K.G.

B687 is presumed to be the original funnel, possibly based on Mitchell’s drawing of Neil B with a blue funnel at Antwerp in June 1987.

The source associates neither B104 nor B688 with a specific vessel.

BBC Peru shows a black funnel top, whereas Nils B on 2 April 2006 does not. Nils B’s flying flag has lighter blue than the funnels and blue letters, matching the website logo. Starboard views show the flag pointing forwards. Letter colour is unclear on several vessels, but AB Bilbao on 16 March 2014 and AB Dublin on 3 July 2010 show black letters and darker-blue flag panels.

B686 follows BBC Portugal on 13 December 2007, with letters appearing the same dark blue as the funnel quarters.