The Dutch have budgeted €4.5 billion (US $6 billion) for the F-35, which they believe will cover the 37 planes — a number the government’s statement says could grow. “If, within the given financial parameters, there is room to purchase more aircraft in the coming years, the Netherlands will do so,” the statement read..............
As a compromise to get the Socialist party finally on board they agreed that under no circumstance there would be a top off order, so it seems 37 will be it.