That begs the question, where does the NLG come from? Nocks is the seller. They may call it different things now but that was the setup
At this moment there are 477M Gulden in existence of which 415M are circulating.
Of those 477M 190M was created in 2014 and the other 248M are since then found by miners as blockreward, that's where the NLG do come from, miners. Oh, and witnesses nowadays.
I could explain how some of those Gulden that Nocks sells come on Nocks but it would feel awkward to do so. Nocks is an exchange.