Dating duraglas bottles

Dating Duraglas Bottles
Characteristic Manufacturing Date Range
Embossed with “DU”, “D”, or “DI” only Pre-1919
Embossed with “Duraglas” in open, block letters 1919-1929
Embossed with “Duraglas” in closed, block letters and circle 1929-1937
Embossed with “Duraglas” in closed, block letters and square 1937-1964
Embossed with “Duraglas” in cursive, italic letters 1964-1990s
Embossed with “Owens-Illinois” 1950s-1980s
Embossed with “O-I” 1980s-Present

**Authoritative Resources:**

* [Bottle Identification Resource](https://sha.org/bottle/)

* [Duraglas Bottle Dating Guide](https://www.sha.org/bottle/dating.htm)

* [Owens-Illinois Glass Company History](https://www.o-i.com/en/about-us/our-company/our-history)

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