Clear swung vase

Still trying to get this one clean. It is a lot better than when I bought it this afternoon. I think I paid $.99 for it at Goodwill. It is 13" tall. It is pretty plain, but does have a bit of embellishment at the bottom, a small curved detail on all four "sides" of the base. I found one like it on ebay and one on etsy, but that is it and no one had a guess as to who made it. Guessing it is American. Comments as to the age and maker welcome.