This small bottle is very crude with a marbled neck, laid on ring top and a pontil scarred bottom. It could have been a poison, medicine, scent or utility. Colored pontiled bottles like this are getting harder to find.

Unembossed

Height: 3 1/2" 
Color: deep purple-cobalt blue

Condition: an uncleaned bottle in it's natural state with some overall dullness that lends character. Structurally perfect.

Reference Number:  GW494