CZECH OCEAN SHIPPING JOINT-STOCK COMPANY.

The website-based flag is blue with a narrow vertical white band near the hoist and a white disc centred in the remaining field, containing a red star. Jorge Candeias acknowledged changing the original oval disc and distorted star to regular forms because he assumed an error; that alteration is not treated as documentary proof of the exact geometry.

Monochrome photographs confirm the funnel. Rosanoski questions a later FOTW lexicon attribution because his own copy shows only C419, while the flag circle is described as consistent with C458.