Thanks! yeah I'm always in Salvation Army, Goodwill and many other thrifts and get lucky quite frequently. I am fortunate that my job takes me to these stores in a variety of cities around the country. Crazy that it survived this long in that condition and made it on to the shelves intact.
This is an unusual case bottle. The shoulders are inflated, rounded, unlike the square-shouldered German bottles (see the grass-green bottle below). The corners are rounded, not sharp like early German bottles. The lip looks too skimpy, too perfect, to be an early 1800s case bottle or even a later transitional "pig-snout" lip finish. The pontil scar looks too neat.
I have a double-handful of case bottles, dating from Late 1700s to Late 1800s, but I've never seen one quite like this one. I don't know where this bottle was made, but it is not from the usual Western European glassworks.