No gold tubing. It's just that they are the genuine article and coveland's are copies of that original design.
From Wikipedia:
Quote:
Caterham Cars are a manufacturer of specialist lightweight sports cars based in Caterham, Surrey, England and part of the British motor industry. Their only model, the Caterham 7, is a direct development of the Lotus Seven designed by Colin Chapman. The founder of Caterham Cars, Graham Nearn, purchased the rights to manufacture the Lotus 7 design from Chapman in 1973.