Mito Tora Sen

This is a very popular E-sen with an image of a tiger on the reverse. Most were cast in copper but iron issues exist. The top left image was recently auctioned on eBay and brought $138.50. It is a beautiful-looking iron issue. But, as far as I know, its seed coin is different from the one used to cast copper issues. In other words, there were two varieties of seed coins: one for casting copper and one for casting iron issue. The problem with this beautiful iron one is that it is not the correct variety for iron. I illustrate three genuine coins for comparison. Can you identify the differences? The beautiful iron one is likely a recent casting using a genuine copper issue.

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