Since 1931, details of every SS and Jaguar vehicle that has been produced have been recorded. Initially this was in a bound ledger which was completed as a vehicle made its way down the production line; from the 1980s the company used computerised systems but continued to record the same details. ​ The Jaguar Daimler Heritage Trust holds these unique production records in the Archive, as well as holding records for some Swallow-bodied and Daimler models. Using these production records we can issue certified Heritage Certificates for vehicles which are more than ten years old showing a vehicle’s entry exactly as it was recorded at the time of production; such as the original colour and trim, dates of build and dispatch as well the original destination and, where recorded, the original registration mark.