Here you can select the number of cards to be placed in a row for each of supported screen resolutions. Your current resolution is highlighted in this way.
it is a genuine unused, no gum as issued, top margin Plate No. 21337 block of six, the top center and bottom left stamps each with a small natural gum wrinkle.
it is a genuine unused, o.g., previously hinged, center line block of four (the top stamps and bottom left stamp never hinged) the top right stamp with a tiny gum disturbance at the top left.