Antique Hemingray No. 40 aqua glass insulator, CD 152, with the patent date embossed "PAT MAY 2, 1892" — a historically significant date variant in one of the most recognizable American insulator forms. Professionally packed for fragile shipment. Ships next business day. Full refund if damaged in transit.
The Hemingray No. 40 is among the most studied insulators in the CD 152 classification, and the May 2, 1892 patent date is a specific and documented embossing variant that collectors actively seek. This example is in classic aqua — the standard production color — with good glass clarity and intact threading. The CD 152 dome shape and the Hemingray name embossed on the skirt are both fully legible.
Condition is very good for age with no chips, cracks, or repairs. The aqua tone reads cleanly in natural light. Natural flow lines from the production process may be present and are not considered damage. Threading is intact on both inner and outer dome.
A solid display piece for a window ledge, light stand, or insulator collection shelf. Strong entry point for new collectors; a meaningful date variant for experienced ones.
Details: Hemingray No. 40 | CD 152 | Aqua glass | "PAT MAY 2, 1892" embossing | Made in USA | Late 1800s – early 1900s | Very good condition
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