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| Pyrex Johnnyball - VERY RARE |
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| "Pyrex" embossed in the wire groove |
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| Pyrex antenna insulators |
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| Pyrex antenna insulators being put in-service on top of a radio station in NYC |
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| Pyrex Johnnyball - VERY RARE |
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| Pyrex neon sign insulator |
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| Pyrex ham radio "entering" insulator |
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| Patent number embossed in wire groove |
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| Pyrex Navy plane entering insulator |
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