Jenkin of Roding. In 1989 the company issued a profit warning – net profits had plateaued since 1984 – and in 1990 Vishay Intertechnology bid to buy Crystalate Holdings, but was turned down in favour of a British company, TT Group, in August 1990. TT Group became TT Electronics in 2000. References Plastics companies of the United Kingdom Defunct manufacturing companies of the United Kingdom Manufacturing companies based in London British record labels Cue sports equipment manufacturers Sporting goods manufacturers of the United Kingdom Record labels established in 1901 Manufacturing companies established in 1901 Hadlow