How do you date a Duraglas bottle?
How do you date a Duraglas bottle?
The term “Duraglas” was first embossed in cursive on bottle bases at some point during the year – so expect bottles with “0” date codes both with and without the word. Duraglas was a glass formula that was stronger than most previous glass mixtures.
What is a Duraglas bottle?
Duraglas trademark, as embossed on the base of a generic amber half-gallon jug that probably held some brand of chlorine bleach. This new, stronger glass formula was given the trade name “DURAGLAS”. Group of four medicine bottles bearing the “Duraglas” marking on both the front heel and the base.
How can you tell how old a brown bottle is?
The seams on a bottle are indicators of how it was made and also indicate its age, says the Society for Historical Archaeology. If a vertical seam ends below the lip and the bottle has no horizontal seams, the bottle was most likely hand-blown into a mold.
How do you read the bottom of a bottle?
In most cases, one- or two-digit numbers are actually mold numbers that indicate the specific bottle mold or section in an automatic bottle machine. If numerous molds were identical, each one received its own number. Base numbers also indicate bottle styles or shapes, manufacturing dates, or factory location codes.
What do the numbers on the bottom of old glass bottles mean?
What kind of bottles are Duraglas trademarked for?
Soda and mineral water bottles, beer bottles, vinegar and apple cider jugs, milk bottles, tobacco humidors, bleach, cleanser and other chemical bottles, kerosene drip jars, druggist/prescription bottles, sauce and other food bottles, prune juice bottles and many other types of containers were marked in this way.
Where are the Duraglas on a 7 Up bottle?
Duraglas marking on base of emerald green 7-up soda bottle (shown below) with 1950 date code. The “7” indicates the Alton, Illinois factory. G-94 was the code number for the bottle style. Emerald Green 7-UP bottle marked “Duraglas” on the base.
What’s the name of the amber half gallon jug?
Duraglas trademark, as embossed on the base of a generic amber half-gallon jug that probably held some brand of chlorine bleach. This is (or was) one of the most commonly-seen trademarks in the history of the United States.
Why was Owens-Illinois Glass given the name Duraglas?
Owens-Illinois had been working for years on improving their container glass formula, increasing it’s strength and durability in order to produce bottles with less weight, thus increasing profitability. This new, stronger glass formula was given the trade name “DURAGLAS”.
