Graham Farish Ltd, 153 Mansion's Hill, Bromley, Kent:
Non-manufacturer. Sold tubes under the Ring brand with his own designation.

Wireless World November 22, 1935 lists 15 tubes offered by the company. 

The company began making radio components in 1919. Owned by Thomas Graham Farish, the company expanded in the 1920's to also make electric fires (radiators), water pumps and lids for vacuum sealing glass jars. It was one of the first companies to use bakelite. In World War Two, the company was engaged in diecasting, general engineerng and electronics. After the War, production shifted to toy train manufacture and this became the sole industry for them. 

In 2001 the company was sold to Kader Industries of Hong Kong and was merged with Bachmann Industries, one of Kader's subsidiaries. The British factory was closed and all production moved to China.