I am trying to determine the approximate year(s) of production of this bottle. The Dr. Pepper is script with a period after Dr / "Good For Life" is block style lettering / The 4 is at the normal 4 location / The face of the 10-2-4 clock is textured. No other markings other than 6 1/2 ozs. areon the bottle. Any help in dating this bottle is greatly appreciated.