| Alexandra Ph’ic Co. | Bedford | -1880- | |
| Baker & Son | Luton | date unknown | |
| Barnard, J | Bedford | -1877- | |
| Bullock, E | Bedford | -1880- | |
| Cantle & Barnard | Bedford | -1869- | |
| Gregson, H | Luton | -1877- | |
| Piggott, Theo J | Leighton Buzzard | -1880- | |
| Thurston, Fred’k | Luton | -1880-1903- |
| Alexandra Ph’ic Co. | Bedford | -1880- | |
| Baker & Son | Luton | date unknown | |
| Barnard, J | Bedford | -1877- | |
| Bullock, E | Bedford | -1880- | |
| Cantle & Barnard | Bedford | -1869- | |
| Gregson, H | Luton | -1877- | |
| Piggott, Theo J | Leighton Buzzard | -1880- | |
| Thurston, Fred’k | Luton | -1880-1903- |
