coinfucious Posted May 14, 2011 Report Share Posted May 14, 2011 I found this on Ebay a few months ago. It is a Japan 100 Yen Expo '75 coin. I have studied it quite extensively, and looks to be made of brass and not a plated coin. Looking at coins made in that era, the Japan 5 Yen coin was made of brass and is very similar in circumference of the 100 Yen coin. The 5 Yen is 22mm while the 100 Yen is 22.5mm. I was thinking a brass planchet accidentally stayed in the hopper when the 100 Yen coins were about to be minted. I'm also assuming that the 5 Yen coins do not get punched out until later in the coin production cycle, which would be why this coin doesn't have the hole in the center as the 5 Yen coin does. Has anyone ever heard of this error, or know anyone else who has one of these coins. I would think it would be a pretty big error. Any thoughts on what it would be worth if real? Link to comment Share on other sites More sharing options...
ccg Posted May 15, 2011 Report Share Posted May 15, 2011 Wow - that is quite interesting. I'd expect a ¥5 to be more yellow in color, so the planchet, if it is indeed off-planchet, is likely something else. Link to comment Share on other sites More sharing options...
amac44 Posted May 15, 2011 Report Share Posted May 15, 2011 With so many coin being copied/counterfeited It maybe one of them???? Link to comment Share on other sites More sharing options...
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