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<p>[QUOTE=&quot;coin_nut, post: 8212893, member: 80148&quot;]Neat looking wartime coins. I have a batch of 20 on the way, all Japanese and I think mostly pre 1939. I will have fun sorting them out. I too am curious about the green spots on the aluminum coin. Probably some form of corrosion. A good soak in some non harmful solvent and perhaps some gentle picking with a wooden toothpick would help? I have used olive oil with success on AE coins, though I would not soak anything for long as it could be acidic. Wash well with soap and water afterward. I am ok with &#039;conserving&#039; coins, not any sort of harmful &#039;cleaning&#039;.[/QUOTE]</p><p><br /></p>

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