Antique Ink Bottle Lavender color spool shape 1880 shops to 1890 hand done "D" mark on the base.

Interesting Ink Bottle here. This one has screw top but has many attributes of a bottle much older including many air bubbles and straw marks but the mold mark comes up to just under, but not through the lip. I feel that this one is 1880 to 1890. There is shops a hand done "D" on the base. Maybe Diamond co. Ink.
This is a light lavender. It measures 2.5 inches tall and 2.25 inches across the base. I find a tiny chip under the screw thread. It is so small that I found it looking through a jewelry magnifier.