Canada 1851 12c black, vertical Specimen overprint in green,...

Canada 1851 12c black, vertical Specimen overprint in green, margins all around, very faint toned spots, still v.f. and rare (Unitrade 3Piii, CA$6,500)

(via Philasearch.com - Canada, Scott 3TC)

http://ift.tt/1JJjtcW