The V suffix plate covers 1st Aug 1979 to 31st July 1980. The rules say you can only have B/W plates on a vehicle manufactured before 1st Jan 1980, so legal for the the first 5 months on the V reg.
Mine has Date of first registration on the V5 as 1st Jan 1980, so it must have been manufactured before then so is legal to have a B/W plate.
The lack of rear reflector and front mudguard would mean an MOT failure, but I don't need one so not bothered!
"Y mae dafad ddu ym mhob praidd" 1972 4/4, 1981 MGBGT, 1984 FLHT1340, 1980 XLH1000, 1990 ZX10