S. Davall and Sons
of 264-270 St. John Street, Clerkenwell, London, EC1. Telephone: Clerkenwell 2917-3760
1947 British Industries Fair Advert as Clock-Makers of high grade springwound, pendulum or lever spring types in modern wood, plastic or metal cases, for domestic use. (Jewellery, Electro-Plate, etc. Section - Olympia, Ground Floor, Stand No. E.1775) 
1960 Patent - Improvements in or relating to clockwork escapement mechanisms. 
1962 Patent - Improvements in or relating to electric timing devices. 
1968 Flight recorders for BEA. Part of Bentima Group.