Prolixin open bottle dating
-There are molded (embossed) "swirls" on the shoulder and upper body of the bottle.
-The glass is clear (colorless) with just the slightest "straw" tint when looking through the thick portion of the base.
So at this point we know that this bottle was made in 1946.
A user need go no further through the Dating page questions to refine the date further.
(Note: The "I" can appear as a dot in the middle of this mark like with this bottle, though on most it is a more or less distinctive "I".)Reading down through the narrative in Question #11, we find out that the number just to the right of the Diamond-O-I mark is the last two digits of the year the bottle was manufactured, which on this bottle is a "46".
As the information under this question notes, ACL's in the U. date no earlier than 1933 and are still being made though most American soda bottles with this feature are from before the 1980s.
the makers markings on the base - we can still make a reasonable determination that this bottle almost certainly dates no earlier than 1933 (ACL, lack of bubbles) and could be as recent as the 1960s (straw tinted colorless glass).
This page provides some examples of how to use the website (primarily the Bottle Dating pages) to determine the approximate date or date range for various types of bottles made between the early 1800s and the mid-20th century.
The bottles used for illustration are a small but diverse assortment designed to give users guidance on how to work a bottle through the dating information to answer the Homepage's primary question #1 - What is the age of the bottle?