1902-03 DIE PROOF of KEVII 4/- POSTAGE REVENUE (SG 139) frame plate in black on glazed card dated 3 MAR 02 (in blue) and marked AFTER HARDENING. VF, a particularly rare state of the die. Typically only a single such impression was taken for checking of the master die roller at each of the after hardening, before striking and after striking production stages.
