https://www.invaluable.com/auction-lot/1915-16-first-wmk-9d-violet-strip-of-six-being-th-1184-c-1d44abaaa51915-16 first wmk 9d violet strip of six being the bottom row of the forme from the Third Setting showing Types a, c, c, c, b, c, a little gum toned o/w fine M. Rare. SG.79.
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