N.V. STOOMVAART MAATSCHAPPIJ "WESTPOLDER".

The flag and funnel were also used by Cornelder’s. Op de Lange Deining omits a funnel top and uses a blue letter. Talbot-Booth 1942/1944 instead describes a green letter on the funnel panel without illustrating the flag; Rosanoski presumes the flag would normally match. Jarig Bakker’s FOTW flag follows De Blauwe Wimpel’s April 1956 chart.

ABC’s funnel panel and Wyt’s Digest 1960 give a black W. Rosanoski suggests that the various colours may represent a very dark shade, without deciding which. A photograph of Oranjepolder confirms an extremely narrow black funnel top separated from the band. Wyt’s 1965–1967 and subsequently FOTW place this version under Cornelder’s.

Mitchell appears to record W243’s funnel from a London sighting in July 1960, but names no vessel.