 A licence to manufacture 3DQP in the US was acquired from the British Government and production was undertaken by AVCO, one of the two suppliers of US RVs, the other being General Electric.First production examples of the Chevaline ReBs were manufactured by AVCO, now part of Textron.Subsequently, production was undertaken in the UK at the Royal Ordnance Factory Burghfield using quartz material purchased from France.