SG 300 6d Dark Purple M33A (2) in very fine used condition with dated yet indistinct CDS cancellation. A hugely undervalued shade on this very complex printing and value.

I actually generally have more 6d Dickinson shades listed than of this SG 300 even in mint condition, and since the two GBF shades were added many that were previously listed as 300's have migrated now to new homes there thus reducing the supply in effect.

Yes, you guessed it, these need checking under long wave UV as I am certainly unable to tell them apart from many of the F's and GBF's in daylight viewing alone.