Canada 1898 2c blue imperf imprint block 4, SG167aCanada 1898 Imperial Penny Postage 2c blue "Map", SG167a, imperforate upper marginal block of 4 (R1 2 3 4) with full "AMERICAN BANK NOTE CO. OTTAWA" imprint. Unused, very fine and a wonderful rarity in this positional form. A total of 600 imperforate pairs (all three colours) are believed to have existed, from 12 panes of 100, with just four imprints per pane. The Imperial Penny Postage issue of 1898 from Canada, known as the "Map Stamps" was an