W. Watson and Son

[3] In the 1890s, the business continued to grow and advertised in catalogues their factories for instruments, optical glass and cabinet work located at Fullwood Rents W.C.

In 1912, the company employed their equipment and demonstrated the utilization of alternating current electricity to enhance the growth of plants in a nursery near London.

[5] In 1929, an advertisement in the British Industries Fair Catalogue announced an Optical, Scientific and Photographic Exhibit.

The exhibition featured manufacturers of microscopes for medical, industrial, and educational purposes and for the amateur, prism binoculars, astronomical and portable telescopes, photographic lenses and cameras, surveying and measuring instruments, photometers, and scientific apparatus of every description.

The company offered photometers, telescopes, prism binoculars, photographic lenses of all types, and optical elements in every form.

[7] The company was also engaged c1930 to produce three prototype cipher typewriters designed and patented by Morgan O'Brien for evaluation by the military.

High frequency apparatus was featured to a lesser extent than shown in previous years, but appliances for X-ray work were plentiful.