The Capstone - Forming A Specialized Collection of Wilding Issue Plate Blocks
Overview of the History of Plate Block Collecting Plate block collecting used to be popular among philatelists who wanted to obtain a copy of each major printing of a stamp produced in a long running definitive series. Obtaining the corner block, or centre block containing the plate number and inscription "proved" that the stamp came from a different printing. Also, since records were generally kept of when the different plates were put to press, a specialist could assign different printings to a specific date. It used to be extremely popular among collectors in the 1950's and 1960's. On Canadian sheets, the layout of a printing sheet was usually between 200 to 600 subjects arranged into 4 or 6 smaller sheets for distribution to the post offices. Usually, the inscriptions were placed on the outer corners of the larger sheets. This meant that for any given post office sheet, you would only get one corner. If you collected all four corners of a plate, they