These are collected in a block of nine: five stamps plus the four labels. Occasionally two different types of perforating (with

These are collected in a block of nine: five stamps plus the four labels. Occasionally two different types of perforating (with different gauges) were done: Line Perf (LPerf) where separate perf wheels are operated horizontally and vertically resulting in perf holes which do not meet at the corners of the stamp and Comb Perf (CPerf) where all perforations are applied simultaneously resulting in perfectly matching perforations on all corners of the stamp. The perforation gauge also varied and is indicated where relevant.