Manufactured by Bernie Allen in Great Bedwyn, Marlborough, Wiltshire 1989 to 1994.
Replicas of the 1961 Norton Manx in 350 and 500cc guise were built at the rate of about 1 or 2 per week. The firm had close ties to Summerfield Engineering of Derbyshire, who built the engines and who also built Manx replicas. Frames were from Goodman Engineering.
Fitted with a 5 speed Hemmings gearbox, they could be supplied street legal, with speedometer, horn and lights. They were of very high quality and were regarded as being at least as good as the original Norton factory machines.
In 1994, the manufacturing rights passed to Preston, Lancashire engineer, Andy Molnar.
Sources: Graces Guide, Wikipedia, et al