Dunno about the plates; ours is from a few years ago ('1956M'). Don't recall what was on the car when Dad bought it, but for some reason they got new vanity plates (think the car might have been 'non-op' for a while). The car is definitely one of the 640, as verified by the BMIHT cert and the Registry ('Registry verified,' which requires a higher level of proof, including correct carburettors, distributor, and correct and matching VIN and body, shroud, prop rod bracket and moldings numbers). Plus, the car was previously owned for many years by a local collector whose granddaughter drove it (sounds like she was a fun person!). IIRC, the CA DMV registration says '100M' on the model description.