The Man Called X - Operation Fifty

It was in 1945 in the Mauthausen concentration camp in Germany that the Man Called X first learned of the existence of the Himmler plates, but it was not until five years later that he heard of them again when a phone call came into the Bureau from Uruguay Intelligence in Montevideo. Inspector Reza says "I tell you Senor Thurston, there can be no mistake". Ken asks "What about the scroll work, Inspector?" He says "Well, there are slight irregularities in the lower left corner". Ken asks "And in the serial numbers?" The Inspector says "The figure four is closed rather than being open". Ken says "Thanks for informing us, Inspector. I'll join you in Montevideo in twenty four hours. Adios, Inspector". Ken hangs up the phone and says "Chief, they've turned up again, the Himmler plates". Chief says "The Himmler plates? Good Lord, Ken." Ken says "I see you remember them". Chief says "How could I forget them. Why those Nazi engraving plates turned out the most perfect counterfeit American fifty dollar bills ever made". Ken says "That's right. Hitler's gang used millions of dollars worth to buy war materials from neutral nations". Chief says "But Ken, we found records stating that the plates had been destroyed". Ken says "What if the records were faked and the Himmler plates were smuggled out of Germany?" Chief says "Well, if they were, this will be a job for the Treasury, not for the Bureau". Ken says "The Inspector says the bills are being passed in Montevideo by a bureau agent". Chief says "Well, that's impossible. We don't have any men assigned down there". Ken says "That's right, Chief". The Chief turns on the intercom and says "Miss Brooks, book passage for Ken Thurston on the first plane to Montevideo, Uruguay". Ken says "Thanks, Chief. I'll be seeing you. By the way, you want me to give your regards to Pagon?" Chief says  What's that chiseling crook got to do with this?" Ken says "Oh, didn't I tell you? Our non-existent agent down there is Pagon Zeldschmitt".