| Maker | Anonymous |
| Dated/City | c.1810 / Wien |
| Key/Pitch (MHz) | 5 keys Clarinet in Bb |
| Descriptions | Boxwood, Horn ferrules, Four brass keys with flat, square key covers; springs attached to keys mounted in blocks. |
| Full Marking | ” (crown) / Wien / A B / (star)/ 2 ” : lower joint, Barrel |
| Additional Marking | ” (crown) / Wien / B / (star)/ 2 ” – Upper Joint, Middle Joint |
| Length | 580 mm. (without mouthpiece) |
| Note: | extension on f#/c# and e/b (now lost) keys to accommodate upper joint, middle joint “corps de rechange” in pitch of A |
