stamperix: Do you mean the following that may relate to the newspaper article that you refer to?:
"Just for example, as part of our tool inventory, we have a set of custom designed and manufactured perforation dies consisting of 44 dies of varying spacing and an accompanying set of 22 hole punches. The perforation dies are manufactured in varying sizes starting with dies for a perforation of '7' (spacing of 0.1125 inches or 2.856mm) up to a perforation '16' (spacing of 0.0492 inches or 1.250mm). Our set of dies includes all dies as referred to by the Kiusalas USA and Canada Specialist Gauges. Sizes for our punches start at .023 inches (.711mm) in diameter up to .046 inches (1.168mm) in diameter in .001 inch (.025mm) increments." (Reference http://home.golden.net/~hanssitt/SR...ome.html#How
While these dies may duplicate both the perforation gauge and the size of the perforation holes, they appear to be done using the stroke flat bar method rather than the rotary wheel method which was the original manner in which most of these perforations were done. This difference allows experts to tell these perforations apart.