Date coded glass

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give me the numbers on the bottom or below the pentastar or safeguard logo of the glass and I'll try and remember Wayyyyyy! back when I worked at the detroit glass plant.. and see if I can decode em. it's been awhile since I did any of that stuff (15-20 years.) so I'll have to beat/rack the old memory to remember that
 
give me the numbers on the bottom or below the pentastar or safeguard logo of the glass and I'll try and remember Wayyyyyy! back when I worked at the detroit glass plant.. and see if I can decode em. it's been awhile since I did any of that stuff (15-20 years.) so I'll have to beat/rack the old memory to remember that

I`ll try to post something tomorrow when I can see them again.
 
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