Foto: Dennis Wubs © 2013
In 1912 bouwde de firma Speith een nieuw pneumatisch kegelladen-orgel voor de Klosterkirche Sankt Bonaventura in Mühlen.
Dispositie:
| I. Manual: C – f”’ | II. Manual: C – f”’ | Pedal: C – d’ | Koppelingen: | Speelhulpen: | |||||
| Bordun | 16′ | Geigenprincipal | 8′ | Subbass | 16′ | I. Manual – | II. Manual | 1 freie Kombination | |
| Principal | 8′ | Rohrflöte | 8′ | Violon | 16′ | Pedal – | I. Manual | 4 feste Kombinationen (p – mf – f – tutti) | |
| Hohlflöte | 8′ | Aeoline | 8′ | Principalbass | 8′ | Pedal – | II. Manual | Automatisches Pedal | |
| Gedackt | 8′ | Vox Coelestis | 8′ (vanaf c) | Gedecktbass | 8′ | Melodiekoppel I. Man.- II. Man. (v.a. g) | Crescendo-Decrescendo | ||
| Octav | 4′ | Gemshorn | 4′ | Cello | 8′ | Basscoppel Pedal zum I. Manual | Rohrwerke Aus | ||
| Flauto Dolce | 4′ | Blockflöte | 2′ – 1976 | Posaune | 16′ | ||||
| Principal | 2′ – 1976 | Oboe | 8′ | ||||||
| Octav | 1′ – 1976 | ||||||||
| Rauschquinte | 2 2/3’+2” | ||||||||
| Mixtur | 4 fach (1 1/3′) | ||||||||
| Trompete | 8′ | ||||||||