My 1939 Clubman was painted and lined -black centre with red line best info I have Paul

When Scotts ceased using black rims they continued with the painted and lined rims until the end of the road in 1951.However

as you say anything was possible at the factory, with the “built to order” programme.I had the 39 and a 48 machine both with painted and lined rims. Scotts listed this as ” a high standard of finnish ” Regards