Hemingray Blackglass Canning Jar . This item is for a sale (9 day) at the online auction: www.gregspurgeon.com/auction/

Auction states: "Availability: Rare. Fresh to the market, this rare Hemingray black glass Mason was found in the crawl space under an early house near Dayton, Ohio. The Hemingray Glass Company (Cincinnati, OH and Covington, KY) made black glass items for only one year, in 1877. A fantastic find and a beautiful early fruit jar."

Hmmm - kinf of disconcerting to me (knowing nothing about canning jar authenticity) that the title of this pic as downloaded from their site starts with the first 3 letters "rad!"