Wing Commander Gibbs was the pseudonym for HRH in WW2, that was the easy bit. Several photographs of that time in the cockpit appear on Interweb, none helping with aircraft ident though one appeared to show the Prince leaving an aircraft. Do I get a mark for the name of his Sealyham, often sharing a cockpit on flights, even if aircraft incorrect?
Your photographs from as far back as HM Queen Wilhelmina show the interest in Aviation expressed by the Dutch Royal Family.