Mystery glass....lamp cover? 1890's-1920's

[highnam]

A little help here people...found in a cedar shake mill that dates between 1890-1920
Thanks!
i think the aqua color has happened over time, could have been clear years ago...

 

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[villagenut]

It is a lightning jar lid. These were patented in 1882 but were made for many years thereafter. Yours looks like a common one from the turn of the century or a little later. Google lightning jar and you will see these closures, I still keep them all, they came in different sizes for different sizes jars.

 

[highnam]

Awesome. Thank you!