Here's another one of the coining machines in use at this large Chinese coin counterfeiting factory. A worker, who looks to be a woman, is operating a machine that applies edge lettering to the edges of the struck coins. This machine is somewhat different from the Schuler edge lettering machine in use at the U.S. Mint for the golden dollars. According to reader Henry N., this one operates more like a Castaing Machine, which was the first machine ever developed for the express purposes of putting edge lettering and other marks on the edges of coins. Minting experts Mike Diamond and Fred Weinberg also concur, based on what they can see in the photo, that the machine is applying edge lettering. Reader Kostas K. pointed out that if you look carefully just to the left of the large tube, you can actually see a coin traveling through the machine!
Source: http://coins.about.com/od/worldcoins/ig/Chinese-Counterfeiting-Ring/Fake-Coins-in-the-Making.htm
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