First off I’d like to thank you all for the information that you have given me, especially Lex for the copy of the Key Card. I’m going to remove the spurious census number from the tank and have a dummy military number plate that I can put over the civvie one at shows. However, I am not sure whether to put the correct census number on the tank or on the front number plate as I have seen on early photos of bikes of the same period opinions would be welcome.
The early RAOC bikes had their census number on the left hand side of the petrol tank, in white letters on a black rectangle. Not so with the early RASC bikes, here the census number was applied rather crudely on both sides of the (black) front numberplate. The RAOC clearly had a good signwriter to do the job, but the RASC numbers were definitely not done by a signwriter!