SG 242a 5d Dull Purple & Ultramarine (OCP) M29 (-) in very fine used condition with attractive, dated London CDS cancellation complementing. Printed on the early, thin chalk papers which, on this value, were generally confined to the latter half of 1906. In my experience one of the scarcer and harder values to locate, corroborated by the very short printing period it was in potential production.