Oldenbrok
1697: New organ by Arp Schnitger.
1753: The organ was sold to Atens.
1752-1754: New organ by J.H. Klappmeyer.
1875: The Atens organ was replaced with a new organ by J.C. Schmid.
Specification of Schnitger’s organ as noted by Klappmeyer in 1753 when the organ was moved to Atens:
| Manual | Brustwerk | ||
| Quintadena | 8' | Gedackt | 8' |
| Gedact | 4' | Principal | 4' |
| Quint | 2 2/3' | Octave | 2' |
| Waldflöte | 2' | Sifflöte | 1 1/3' |
| Quint | 1 1/3' | ||
| Sesqualtera | II | ||
| Mixtur | IV | ||
| Trompete | 8' |