The overall crudity of the bottle would indicate a manufacturing time on the earlier end of this range. Blue-green colors were described under the "green" color section above. A search on the internet will turn up some scattered references to the bottle - primarily ones that are for sale or just referenced - but little historical information. As in describing all bottle colors, modifiers are useful in clarifying the specific greens. An outstanding bottle with substantial chips to string-lip and two small nips to seal edge; all else fine. These variably moderate to intense blue colors are usually produced with the addition of the strong coloring agent cobalt oxide to the glass batch.
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The user is then encouraged in the note under Question 2 to move to the Machine-made Bottles section Question 8 where one bit of additional dating refinement is that the glass has a slight straw color tint indicating manufacture after the late s. Mint condition except for a chip out of the base edge as shown; H: This is consistent with the very flattened embossing on this bottle can not be seen in the picture.