Helicon. Nominal pitch: E♭.
- Place of production:Manchester/Greater Manchester/England
- Date of production:Circa 1892
- Collection:University of Edinburgh
Helicon. Nominal pitch: E♭.
- Place of production:London/England
- Date of production:1911 or soon before
- Collection:University of Edinburgh
Helicon. Nominal pitch: E♭.
- Place of production:Aldershot/Hampshire/England
- Date of production:Post 1860, probably c1880
- Collection:University of Edinburgh
Helicon. Nominal pitch: E♭.
- Place of production:London/England
- Date of production:Post 1865, probably c1880
- Collection:University of Edinburgh
Helicon. Nominal pitch: B♭.
- Place of production:Erfurt/Germany
- Date of production:Mid - late 19th century
- Collection:University of Edinburgh
Helicon
- Place of production:London (Timezone: Europe/London)
- Date of production:1844–1922
- Collection:Museum of Army Music
Helicon. Nominal pitch: B♭.
- Place of production:Lyon/France
- Date of production:1861-1868
- Collection:University of Edinburgh
Helicon
- Place of production:Turin (Timezone: Europe/Rome)
- Date of production:1861–1900
- Collection:Museum of Army Music
Helicon. Nominal pitch: B♭.
- Place of production:London/England
- Date of production:1876-1889
- Collection:University of Edinburgh
Helicon. Nominal pitch: E♭.
- Place of production:Paris/France
- Date of production:Circa 1890
- Collection:University of Edinburgh
Helicon
- Place of production:France?
- Date of production:c.1900
- Collection:Bate Collection, Oxford
Helicon.
- Place of production:Porto, Portugal.
- Date of production:Early 20th century
- Collection:Royal Conservatoire of Scotland
Helicon. Nominal pitch: B♭.
- Place of production:Probably Czechoslovakia
- Date of production:Circa 1910
- Collection:University of Edinburgh
Helicon. Nominal pitch: B♭.
- Place of production:Elkhart/Indiana/United States of America
- Date of production:Circa 1913
- Collection:University of Edinburgh
Helicon. Nominal pitch: E♭.
- Place of production:London/England
- Date of production:1937
- Collection:University of Edinburgh