N.V. Bureau Wijsmuller, IJmuiden (a towing company).
Houseflag: three horizontal stripes red - white - blue; in the center
an elongated white hexagon charged with B.W. in black
Image from Flagchart of houseflags of Dutch shipping companies, attached
to the magazine "De Blauwe Wimpel", April 1956.
Jarig Bakker, 22 Oct 2003
image by Jarig Bakker, 6 Jan 2006
Image after Brown's Flags and Funnels Shipping Companies of the World,
compiled by J.L. Loughran, Glasgow, 1995 [lgr95]
Wijsmuller B.V., IJmuiden - blue flag, white disk, black "W".
Jarig Bakker, 6 Jan 2006