1908s. Indian head cent. - green patina

[azmetaldetector]

Would like opinions. I believe I found a 1908 s Indian head cent. However the Green patina is thick enough that I can't be 100% sure. What are your thoughts about whether I should clean it any more than I have which was just toothbrush and soap. Should I send it in for cleaning.

 

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[cosmic]

Don't send it in to NCS( sister company of NGC) THEY WILL RETURN A BURNT COPPER SLUG THAT USED TO BE A COIN!! They have no idea how to conserve a copper coin.. Destroyed a 1877 Indian head..

 

[Goes4ever]

can you post up a good clear macro shot? I have never seen patina so thick that would prevent seeing the mintmark. Is it patina or green crust?