Antique Japanese Coffee Urn

We have discovered an Antique Japanese Copper Coffee Urn at a friend's house and wonder what it's value is as a donantion to a non-profit rummage sale for a museum. The best that we can tell from looking at the identification on the urn is that it was made by the Kosakusho Company in Osaka, Japan. 

Does anyone know anythung about this very interesting item?

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