registering my st 70

I've recently purchased a St 70, it doesn't have a registration number so i applied for a v5 from dvla but have now replied saying that they have no record of the frame number given, has anyone else gone through this??
thanks Rob

Yes, try and do a HPI check against the VIN number, if that doesn't work you will have to go down the Dating letter process. If you need help contact the VJMC as will help if you are a member