Natal 1874 QV 1d Die Proof Before Hardening, 1893 Printing, Rare

1874-99 DIE PROOF of the 1d (SG 66 etc) in black on glazed card dated 6 JUL 93 and marked BEFORE HARDENING. F, tiny inclusion/abrasion to right of oval, rare & attractive proof from the later additional printings of this stamp.