Lot 320, Canada twelve penny black plate proof with vertical SPECIMEN in green, sold for C$4,914

Lot 320, Canada twelve penny black plate proof with vertical SPECIMEN in green, sold for C$4,914Lot 320 Canada #3Piii 12d Queen Victoria Plate Proof in Black with Vertical SPECIMEN in Green, on card-mounted India paper, with four margins, very fine. The rarest of the four issued plate proofs in black, and rarely offered. Rsv. $2,900. Unitrade CV$6,500, sold for C$4,200.00 plus 17% buyer’s premium.