Music found in a Groningen archive of the Van Starkenborgh family, befits an organ made in a Groningen church.
Yes, I know Arp Schnitger is from North-Germany, Ost-Friesland, but he did so much work in the province of Groningen, that this organ in Noordbroek is to be considered a Groningen organ. And we can consider him a Groningen builder; his successors lived mainly in Groningen city as well (Frans Caspar Schnither Jr,, stepfather Albertus Anthoni Hinsch, Herman Heinrich Freytag.
Note: Groningen is the name of the province and its capital city (the same is true for Utrecht). .