I have a copy of the original brochure which contains all of the same info in that article. One of the "key" things to look for in buying KC roulettes is the handstamps or pencil initials of one or more of the people involved with it back then. If there are NO initials or handstamps, tread cautiously, because an ordinary cookie cutter roulette can create these from cheap raw material #408-409.
I guess you can still do perforations today on a sewing machine, if you have the equipment, patience and intent to perforate imperforate stamps (or other things) made of paper. (Not so sure if it would work so well on self stick stamps, though.)
Frankly it seems like more work than it's worth, especially since the end result is so obviously a fake:
wt1... I watched that video... and, I must admit I was *majorly-disgusted* after doing so... and to think that someone had the AUDACITY to make a video of it and post it on the internet...
I can only hope that guy is (not) an internet seller...
It actually would be neat just for other applications that aren't for spurious philatelic endeavors though. Having said that though I sort of agree about the sickly feeling.
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