This 1977-1978 Upper Right Corner Block of 4 12c carmine rose Scott #J36a, Perf 12.5x12, Fourth Issue Postage Due stamps from Don's Classic Stamps is in Very Fine (VF) Mint Never Hinged (MNH) condition. The Unitrade Specialized Catalogue of Canadian Stamps, which follows the Scott numbering system format in its listings, has a Catalogue value of $15.00 (in Canadian currency) for this block.  (Item #12,112)