An antique pressed glass piano insulator in green glass that flouresces under a UV light. Manufacturer unknown but quite possibly one of the Manchester factories.
Size
Diameter a little over 3½" / 9cm;
Height 1⅞" / 4.7cm.
Condition
The top (most visible) is in good condition with only light wear and a single flake off the edge. There are two chips off the underside edge.
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