Some good news. MMC came back to me and confirmed our Plus Six body paint code, it is indeed a Porsche colour... So thank you to MMC.. Just waiting to hear back for the code of the silver used on the Speedster wheels.
Dave Plus Six "Squeak" Roadster departed. 1936 BSA Empire Star Q8. 1935 BSA W7-35. 1938 BSA M20
