This 1943 Lower Left Corner Block of 4, Plate 4, 7c deep blue Scott #C8 "British Commonwealth Air Training Plan"  War Issue Air Mail stamps from Don's Classic Stamps is in Mint Never Hinged (MNH) condition, with overall "spotting" on the front of the block and a shallow paper "fold" in the top-left (small) Tab (See Images). The Unitrade Specialized Catalogue of Canadian Stamps, which follows the Scott numbering system format in its listings, shows a Catalogue value of $12.00 (in Canadian currency) for this block.  (Item #11,716)