Hey Robert, I think the swirls in the neck of that flask is just from being in the ground. It's the mineral leaching out of the glass. Otherwise known as the "sickness". But it looks cool to me ! Mitch
Thanks, Red. It was fun to figure out the approximate date using all I had. If ever you find a teal druggist, it was likely made by W.T. & Co. as the did a lot of teal-colored meds for pharmacies. ?•??•?