My Roadster 100, with a CoC dated March 2010, has only the rev counter ahead of the driver. S2 or S3?
Oh yes, I forgot that the S2 (&S3) dash had the revcounter in front of the driver, and the speedo and tri gauge in the centre! I must have blotted that from my memory because its not my favourite layout...
Gastons note above is a good way to split the S2 and S3, in addition to the wider front track of the S3.