I found this out in our pasture while we were digging one day. It's an amber colored clear bottle with a cork still in the top. It's 3 inches tall and has a 25 mils mark and a 30 mils marks on it. The bottom says 1845 and above that date it has the numbers 7 & 9 with a symbol that looks like a vertical oval with a slimmer horizontal oval inside it. Pictures posted.