I believe your inquiry has confused the purpose of membership in our on-line community. The members of the CCF are not going to assist you in the sale of this item.
That said - we can and will offer advise. I suggest that you contact one of the large, international numismatic auction houses and engage their support.
Two names that come to mind are Heritage Auctions and Stacks-Bowers. I'm certain there are others, and perhaps even some specialists near your location.
Such firms can, for a fee, confirm authenticity of the item and market it on your behalf.
Best of wishes.
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