Clean Mint

I have a half dime coin is tarnished and can really see a mint mark low but wanted to know if there is a way to clean it or to see it without cleaning. There's a photo on the link below - back half penny - nearly Use enlarge http://picasaweb.google.com/gen6363/Coins top right #

You do not mention a date, but it seems to be a dime Seated Liberty half (dated from 1860 to 1873). A mint mark would be placed under the bow would be: S (San Francisco), O (New Orleans), or plain (Philadelphia), although I do not see one in the photo. Most collectors prefer to clean tarnish such a coin. I would not try to clean the room because it seems to be very nice condition and clean, it would only decrease the value. Do you have a magnifier of some type that might help you see The mint mark if any? I hope it helped.

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