Early 1900s vintage bottle embossed Crown Bottling Works - Jefferson Wisconsin. These are a little uncommon, I think. I've lived around and worked in Jefferson county for many years, and this is the first one of these I've even seen.
It's very heavy glass, about 7 1/2" tall overall. It's scratched and worn, but clean, without chips or cracks. Pretty pale green color, like old sea glass.