This is Gary's chassis plate.
When the car came to South Australia it didn't have a chassis plate at all. If it had ever had one it would have remained on the previous owner's mantlepiece. In all of its racing years there would have been no requirement for it to have had one. However, in about 1993 Colin wanted to turn it into a road car. In NSW it was a requirement that all registered vehicles have a chassis number, presumably to help trace them if they happened to be stolen. I am presuming the inspector couldn't find a valid chassis number wherever he looked on the car. It would then be his job to issue one to it. A blank chassis plate would then have been legitimately acquired from Bolwell or the Victorian Bolwell Club to be attached to the car with the appropriate information stamped on it. Each state authority had the provision to issue engine numbers and chassis numbers if a vehicle didn't have one. N932898P is one of these numbers, where the "N" signifies NSW, the "P" is for police and the "93" shows the year it was issued. So this number was the 2898th number issued by the NSW police in 1993. As for the 1970 stamped on it I'd say it was a good guess by somebody but not necessarily correct.