Information on the Duffy malt whisky company

Has anyone ever heard of the Duffy malt whisky company.

Rochester N.Y. U.S.A.

The bottom of the bottle is marked Pat. Aug 24 1886

This is a very common but attractively embossed bottle...right now you can have your choice of about 100 listings on eBay

Curiously, the product was advertised for its medicinal qualities. The advertisement below comes from this eBay auction

https://www.ebay.com/itm/1911-Duffys-Pure-Malt-Whiskey-Newspaper-Ad/114131319460?hash=item1a92c1baa4:g:RB8AAOSw4KdeVwfb

Yes i know, I just came from Ebay, I thought because of its age I had something good.

Thanks for commenting Chris