[Jan Hendrik]

I have never seen a Dutch flag like that before.
Depicting a crown would mean royalty, but the Dutch swing an orange banner next to the flag when the monarchie is involved.
It could be the house flag of a shipping company.

Perhaps Ruud can help out??

 

[Jan Hendrik]

I think it is a totally different ship, even in case she would have been modified.
The port holes are not in same sequence, the anchor is placed not in same spot and both decks are a totally different design.

 

[Jan Hendrik]

I never saw it in the Netherlands Antilles. I lived there and worked in the shipping business (as always)
Still intrigues me, this flag or ensign.

 

[Jan Hendrik]

I will ask a friend in the Neth Antilles, he is in the marine business too.
Jan