Eagle Pencil Company - Eagle Glass Vial Fountain Pen ca. 1890 - Fountain pen

Rare Eagle Glass Vial Fountain Pen from circa 1890. This model is historically known as one of the very first fountain pens with a patron system. 100% complete and in exceptional condition:
* Glass ink tube: Fully intact, with no cracks or chips. Ultra-thin, hand-blown glass that rarely survives.
* Original cork: Present and intact.
* Rubber connection ring (nib connector): Present and visually intact. This fragile component is in virtually all other surviving examples completely rotted away or missing.
Due to the extreme fragility of the antique rubber ring and glass ink tube, the parts have not been tested for functionality.