F. Hills and Sons
F. Hills and Sons of Norton Road, Stockton-on-Tees; of Trafford Park, Manchester.
of County Durham
1849 Company founded.
1935 Built their first aeroplane.
1936 Public company.
1937 Aircraft manufacturers. "Hillson Praga" Monoplane. The plane was based on the Czech E114 Praga; production began in 1936 and ended after 28 air frames in 1939.
1961 Timber importers and manufacturers of doors, plywood, flooring and plastic laminates. 
Built the Pennine and Helvellyn models.
Sources of Information
- 1937 The Aeroplane Directory of the Aviation and Allied Industries
- 1961 Dun and Bradstreet KBE
- The Times Apr. 10, 1970
- British Aircraft Manufacturers since 1908 by Gunter Endres. Pub 1995 ISBN 0-7110-2409-x