Canada, 1851-59 Issues, plate proofs on India. With "Specimen" overprints, 8 different including 2TC(3) steel blue, black and slate gray, 8TC black, 9TC black, 15TC vermilion, and 16Pii black brown, one has a small thin, very fine lot. Unitrade No. 2TC//16Pii  C$2,250 ($2,288). $0 (Image)