Mouth organ, or symphonium
- Place of production:United Kingdom
- Date of production:
- Collection:Science Museum
Symphonium
- Place of production:London (Timezone: Europe/London)
- Date of production:circa 1829
- Collection:Horniman Museum and Gardens
Wheatstone's symphonium
- Place of production:England
- Date of production:
- Collection:Science Museum
Symphonium
- Place of production:London (Timezone: Europe/London)
- Date of production:1829-1830
- Collection:Horniman Museum and Gardens
Symphonium
- Place of production:London (Timezone: Europe/London)
- Date of production:circa 1835
- Collection:Horniman Museum and Gardens