BLOCKS AND STRIPS

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In order to save time, a sheet might be folded prior to perforating. Indeed the above block indicates a sheet that was folded into several columns prior to perforating with probably a single die.

Block of GB 1d Lilacs

The next block again illustrates folding into columns prior to perforation. The relative placement of the dies on the upper row show that there were several fold-and-perforate operations.

Examining the letter 'N' in detail revails there are but two distinct types. The one on the left occurs on all stamps on rows 1 and 3 and the one on the right occurs on all stamps on row 2. This shows that the perfin head consisted two dies.

Block of GB 1d Lilacs

This second block illustrates another perfin die used by the same company. This time the sheet was folded into rows instead of columns. In addition, the sheet was rotated through 180 degrees, resulting in stamps with normal, reversed and inverted-reversed perfin strikes.

Noting the position of the stamps with a damged 'N' we can deduce that yet again the perfin head consisted of two dies.