You are welcome Richard.
In fact these cars (coupé & convertible) were not produced at the Simca factory in Poissy (now PSA factory always in service) but hand crafted at Facel factory at Colombes near Paris.
Below 2 rare pictures of the first prototype cars (pre-serie) at Facel plant in Colombes.
2 links in french for those interested :
History & pictures 1 Facel blood in the veins