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This is an odd, uncommon piece in the "-51X" series. Based on the similar design, this may have possibly been the final version of the earlier experimental CD 233 E3.

Primary Embossing:
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HEMINGRAY
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Dates Produced:
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1939-1940s |
| Style Number: | 511 |
| Usage:
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Power
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| Voltage Rating:
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7,500 Volts
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