KLG Sparking Plugs
of Putney and later of Treforest
1919 sold world distribution rights to Smiths
1922 Made by the Robinhood Engineering Works.
c.1927 Sold to Smiths.
1937 Kennelm Lee Guinness died.
1937 Manufacturers of sparking plugs and sparking plug wireless screens. "K.L.G." Sparking Plugs.
1939 See Aircraft Industry Suppliers
c.1940 They set up a shadow factory at Treforest, in South Wales, to protect the business from bombing. After the war production continued at both places.
1963 Motor Show exhibitor. Sparking plugs.
An account of the development of KLG plugs may be found in the booklet 'The Vital Spark!' by Keith Gough 
Sources of Information
- 1963 Motor Show
- 1937 The Aeroplane Directory of the Aviation and Allied Industries
-  Gallot
- Smiths Industries at Cheltenham by Chris Ellis. Published 1990 ISBN 0 904811 18 2