How Old Is This Ink Bottle?

[MilitariaCollector]

Does anyone know how old this ink bottle is? It is about 2 1/2" high x 1 7/8" wide. There appears to be a vertical seam on both sides that ends about a 1/2" below the lip of the bottle. There are no markings on the bottom.

 

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[Road Dog]

Need a better side pic to see if the lip was applied or not. From what I see probably 1890's. That shape was used thru the 1920's.

 

[jrsherman]

Not sure, but it sure is a beautiful aqua color!