Glass ribbed bowl
Translucent cobalt blue.
Thick, slightly outsplayed rim with almost pointed edge, sloping inward below; convex curving side, tapering obliquely downward; concave bottom.
On interior, a single broad horizontal groove, cut at junction of rim and side; on exterior, forty-five short rounded ribs of varying width, thickness, and length.
Intact, except for minor chips in rim; some pinprick bubbles; faint dulling and iridescence, with small patches of encrusted weathering on interior.
Rotary grinding marks on interior and on band around exterior of rim; series of irregular tooling marks and indents on band around exterior of rim.
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