Very interesting! Thanks for that. There in print is my color scheme. Pearl grey / Pippin red and the Pearl grey vinyl with Bright red vinyl.Here are a couple of pictures from two late 50’s, early 60’s Sunbeam Rapier brochures showing the colour schemes offered for those years, unfortunately no codes supplied.
Oddly enough the brochures have no dates printed on them. Cars described have 1494cc engines, so no newer than early 60’s.