- Dollond, John, 1706-17612
- Thomas Cook and Sons LTD.2
- Troughton & Simms, London2
- Adams, Dudley, 1762-18301
- Browning, John, 1835-19251
- Dollond, P. (Peter), 1730-18201
- George R. Collins, n.d.1
- Martin, Benjamin, 1705-17821
- Nairne, Edward, 1726-18061
- Tulley & Sons1
- William Little, 1775- 18481