W.F. Stanley and Company Limited

W. F. Stanley & Co. was a precision instrument maker founded in 1847 by William Frederick Stanley in London. The company specialized in the production of surveying instruments, such as theodolites, levels, and compasses. Stanley instruments were known for their high quality and precision. In the early 20th century, Stanley of London expanded its product line to include microscopes, telescopes, and barometers. The company also began to manufacture optical instruments, such as binoculars and telescopes.
more info at

• https://en.wikipedia.org/wiki/William_Stanley_(inventor)
• http://www.mathsinstruments.me.uk/page43.html
• https://collection.sciencemuseumgroup.org.uk/people/ap26625/w-f-stanley-and-company-limited
• https://www.carters.com.au/index.cfm/index/15866-stanley-w-f-and-co-england-precision-instruments/