1 янв 1808 г. - Improvements by Jacques Francois Simiot

Описание:

- Bore increased to 15mm
- Larger toneholes
- Moved speaker hole/register hole to front of instrument
- Inserted a brass tube into LH thumb hole to reduce blockage by water
- Added a brass tuning slide between upper and lower joint
- Added a mark indicating how to adjust bell placement when using pieces de rechange
- Added a side key on the lower joint for a lower register B

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