1734: Enlargement with a free pedal by Johann Dietrich Busch.
1803: Repairs by Krämershoff
1833: Repairs by J.G. Schmid
1870-1871: New organ by J.C. Schmid.
1951: Changes by Alfred Führer
Specification as stated in the contract with Schnitger:
| Oberclavier | Unterclavier | ||
| Floite dues | 8' | Gedact | 8' |
| Principal | 4' | Floit | 4' |
| Quinte | 2 2/3' | Nasat | 2 2/3' |
| Octave | 2' | Octav | 2' |
| Sexquialt | II | Waltfloit | 2' |
| Mixtur | IV | ||
| Trompet | 8' |