United Optical Instruments
|Adams & Co. | Agilux | Aldis | APeM | Aptus | Artima | Barnet Ensign | Beard | Beck | Benetfink | Billcliff | Boots | British Ferrotype | Butcher | Chapman | Cooke | Corfield | Coronet | Dallmeyer | Dekko | De Vere | Dixons | Dollond | Elliott | Gandolfi | Gnome | Griffiths | G. Hare | Houghtons | Houghton-Butcher | Hunter | Ilford | Jackson | Kentmere | Kershaw-Soho | Kodak Ltd. | Lancaster | Lejeune and Perken | Lizars | London & Paris Optic & Clock Company | Marion | Marlow | Meagher | MPP | Neville | Newman & Guardia | Pearson and Denham | Perken, Son and Company | Perken, Son & Rayment | Photopia | Purma | Reid & Sigrist | Reynolds and Branson | Ross | Ross Ensign | Sanderson | Sands & Hunter | Shackman | Shew | Soho | Standard Cameras Ltd | Taylor-Hobson | Thornton-Pickard | Underwood | United | Watkins | Watson | Wynne's Infallible | Wray|
United Optical Instruments were based in Southend-on-Sea, England. They are known to have made at least two cameras, in the 1930s:
- Jupiter - a very simple plastic 127 film camera;
- Merlin - a sub-miniature(20x20mm frame) cast metal camera.