Chapron to build two four door drophead cars based on the SM.

They were first used on the occasion of the 1972 state visit to France of Queen Elizabeth II of the United Kingdom.

Both of these cars were 5.6 m long and weighed 1 890 kg and despite the massively increased weight were fitted with the standard SM V6 engine.

Changes were made to the final drive to allow the cars to drive slowly in ceremonial processions.