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<p>[QUOTE=&quot;Dnas, post: 3013470, member: 93707&quot;]The round silver (gin) counterstamp was used to designate a one yen coin to be used as a trade coin outside if Japan. &quot;gin&quot; mark on the left is Osaka mint,&nbsp; on the right is Tokyo mint.</p><p>Chop marks were punched by Chinese merchants to test the coin for fakes. They had to be deep enough pierce the surface to see underlying silver[/QUOTE]</p><p><br /></p>

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