Glass flask decorated with intersecting circles

Translucent colorless with pale blue green tinge.
Uneven rounded rim with slight inward lip on one side; upper half of neck funnel-shaped, then more cylindrical but tapering downwards; pushed in shoulder, above vertical collar; spherical body; projecting round edge to base concave bottom; no pontil mark. Body blown into a four-part mold of three vertical sections, joined to a shallow, disk-shaped base section.
On body, sunken relief design of nine interlocking circles with a dot at the center of each circle, bordered above and below by a double row of smaller dots; on bottom, a raised circle around a small central knob.
Intact; some bubbles and blowing striations, with a sharp, trail-like swirl on inside of neck, shoulder, and collar; dulling, pitting, and iridescence on exterior, patches of weathering on interior.

Decorated with intersecting circles.