We've all seen the intricate patterns in the designs of the 1935, 1937 and the 1969-79 notes, but have you ever wondered how they were made. I've seen the geometric lathe at the currency museum, but how it actually worked, no one there could ever really explain.
So I was 'surfing' and stumbled on to the following Youtube video.
http://www.youtube.com/watch?v=LJv0KpuDR1g.
It's only 13 minutes and is well presented. Might be worth a quick view…
JC
