These Jewellers Screwdrivers were sold in sets by Norris Planes & Tools Ltd, though it is believed that the largest screwdriver was sold separately. Most of the screwdrivers that turn up on the secondhand market seem to date from the 1950’s.
Norris Planes Ltd. operated from 1944 until 1946, when the name was then changed to Norris Planes & Tools Ltd, a subsidiary of Aeronautical and General Instruments Ltd of Croydon.
