AANNEMINGSBEDRIJF OOSTERWIJK B.V.
image by Eugene Ipavec, 6 February 2009
Duwvaart shows five horizontal bands, described as BWBWB, with the central band wider and containing an italic O. A small colour photograph was also found as a website signature. Rosanoski cautions that the slanted O in the book may be wrong because the photographed flag looks more upright.