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This style is the small size in the "600" series, followed by the 670 (CD 220) and the 680 (CD 221). Later replaced by CD 218. It is believed that the versions with No Embossing may have been manufactured by Hemingray as well.

Primary Embossings:
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HEMINGRAY NO EMBOSSING
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Dates Produced:
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1938-1940s |
| Style Numbers: | 66, 660 |
| Usage:
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Primary Power Distribution
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| Voltage Rating:
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8,000 Volts
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