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.
- United Optical Instruments Merlin at www.collection-appareils.fr
Community content is available under GFDL unless otherwise noted.