Watched the movie "The Counterfeiters" and it was really good. I had no idea this occurred. We all know the Germans rule the printing world and I'm sure at the time this was huge. The plan was to destabilize the English financial system. One of the foot notes said they produced 4 times the pound notes held by Britain's reserves.
http://en.wikipedia.org/wiki/Operation_Bernhard
"The plan was directed by, and named after, SS Sturmbannführer (Major) Bernhard Krüger, who set up a team of 142 counterfeiters from inmates at Sachsenhausen concentration camp at first, and then from other camps, especially Auschwitz. Beginning in 1942, the work of engraving the complex printing plates, developing the appropriate rag-based paper with the correct watermarks, and breaking the code to generate valid serial numbers was extremely difficult, but by the time Sachsenhausen was evacuated in April 1945 the printing press had produced 8,965,080 banknotes with a total value of £134,610,810. The notes are considered among the most perfect counterfeits ever produced, being almost impossible to distinguish from the real currency."
http://en.wikipedia.org/wiki/Operation_Bernhard
"The plan was directed by, and named after, SS Sturmbannführer (Major) Bernhard Krüger, who set up a team of 142 counterfeiters from inmates at Sachsenhausen concentration camp at first, and then from other camps, especially Auschwitz. Beginning in 1942, the work of engraving the complex printing plates, developing the appropriate rag-based paper with the correct watermarks, and breaking the code to generate valid serial numbers was extremely difficult, but by the time Sachsenhausen was evacuated in April 1945 the printing press had produced 8,965,080 banknotes with a total value of £134,610,810. The notes are considered among the most perfect counterfeits ever produced, being almost impossible to distinguish from the real currency."