Dulk den H.F
Captain H.F den Dulk was a chief officer who was promoted in 1954 and made some voyages on the Abbedyk, Aversdyk and the Blommersdyk.
I have not been able to find any other information yet.
NOTE: If there are any family members out there or other people who have information about Captain den Dulk (even if it is only a photo) please contact me on Captalbert1@aol.com. I would love to make his biography more complete.