Reading between the lines moggywills it appears your 2017 Roadster has the factory 5 link rear although this was not introduced into production until April 2018. Could it be, being an ex Geneva car, this was displaying what was to come?
Yes it sounds like that could be the case as I too realised that the 5 link was not introduced until 2018.
Mind you there is a £5k invoice in the history file for SSL modifications, which I took to mean the SSL coilovers to replace the original Morgan factory installs plus front end.
Another nice feature ( i am told) is that the factory added a few extra coats of the willow green paint so that it shone under the Geneva show spotlights !!