- Dienst Barrel Orchestrion, c. 1905...
- Faventia Miniature Barrel Piano, c. 1960...
- Concert Zither in Suitcase, c. 1900...
- Mechanical Zither "Triola", 1919 onwards...
- Group of Interesting Mechanical Music Instrum...
- "Humor" German Barrel Orchestrion, 1906 onwar...
- Reference Literature: Singing Bird Boxes, Fai...
- Paul de Wit, "Welt-Adreßbuch der gesamten Mus...