The following will help you date a bottle; I learned a long time ago that bottles bearing an inscription relating to the re-filling of a bottle ("Federal Law Forbids Sale or Reuse of This Bottle") dates it as being made after 1932-one year after Prohibition ended; The Volstead Act created Prohibition and ran from 1920-1932.
If I'm not mistaken it only applied to whiskey bottles.
http://www.bottlebooks.com/federal_law_prohibits_.htm
If you want to see an interesting documentary catch Ken Burns' PBS program "Prohibition"-all 3 parts. It just came out. Really well done.