Furst-Mcness co. Freeport Illinois bottle

[Timelypicken]

I’m guessing 1940’s or 1950’s and it’s not rare, but I know it’s a medicine bottle and I was wondering what kind of medicine it had.

 

[Screwtop]

Actually, I just dug one like that from a dump site that dated to 1910-1935. Yours appears to be in that date range of late 1920s, early 1930s. Furst McNess made cooking extracts at the time.