This 1932 Block of 4 overprinted 6c on 5c brown olive Scott #C3 Air Mail Issue stamps from Don's Classic Stamps is in Fine+ (F+) Mint Never Hinged (MNH) condition, with various red "spots/marks" overall (See Images). The Unitrade Specialized Catalogue of Canadian Stamps, which follows the Scott numbering system format in its listings, shows a Catalogue value of approx $49.50 (in Canadian currency) for this block. (Item #9986)