Opus 23 Specifications
| Manual I | Manual II | |||
| Principal | 8' | Gedackt | 8' | |
| Rohrflöte | 8' | Viola da G. | 8' | |
| Octave | 4' | Celeste | 8' | |
| Octave | 2' | Spitzflöte | 4' | |
| Mixture | IV | Waldflöte | 2' | |
| Oboe | 8' | Nasat/Cornet | II | |
| Trompet | 8' | |||
| Pedal | ||||
| Subbaß | 16' | |||
| Octave | 8' | |||
| Posaune | 16' | |||
| Trompet | 8' | |||
| 3 couplers | ||||
| Tremulant | ||||
| Cymbelstern | ||||
The pipework of both manuals except the Principal 8' on Manual I are contained in a single swellbox integral to the case.