Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 133,410 pages of information and 211,625 images on early companies, their products and the people who designed and built them.
of 103/109 Cornwall Street, South Tottenham, London, N17.
1929 Advert in British Industries Fair Catalogue as an Optical, Scientific and Photographic Exhibit. Manufacturers of Aircraft air Speed Indicators and Recorders. Turn Indicators, Anemometers, Wind Direction Indicators and Recorders, Gauges, Microtomes, Tube Scale Dividing Machines. (Scientific Section - Stand No. O.30) 
c1930s R. W. Munro Ltd., of Chine Road, Bounds Green, London, N11 2LY - makers of anemometers, anemographs, barometers and barographs.
1932 Patent - Improvements in or relating to machinery for conveying, grading, sorting and sizing produce or articles such as coal, fruit, and such like.
1937 Aircraft instruments. 
1940 Patent - Improvements in or relating to pressure gauges for use in air speed indicating apparatus.
The company has its own website: