HALCYON LIJN N.V.

Sources differ over the width of the flag’s green band, broad in Brown and very broad in Harnack. Pre-war sources consistently show black letters; Wij Varen Weer in 1946 and later sources show green. Rosanoski discounts Harnack’s later black lettering as unupdated material rather than reliable evidence of the change date. Stewart 1963 extends the diamond across the full depth of the broad flag band but not the funnel band; some other funnel illustrations do extend it throughout, probably depending on funnel width. Vlaggen en Schoorstenen shows a double-sided flag. The FOTW H178 version also has a very broad green band.

Rosanoski considers this funnel suspect; its source is Wij Varen Weer, 1946.

Wyt’s Digest, Op de Lange Deining and the De Blauwe Wimpel chart show equal flag stripes. Wyt’s Digest 1960 indicates a lighter green. Rosanoski suspected that Wyt’s was the origin of the equal-band portrayals.