This style is the middle size in the "600" series, between the 680 (CD 221) and the 660 (CD 218 and 219).
Primary Embossing:
HEMINGRAY
Dates Produced:
c.1937-1940s
Style Numbers:
67, 670
Usage:
Primary Power Distribution
Voltage Rating:
10,000 Volts
4 1/4" H x 3 3/4" W
Mold Variation
Small Saddle Ridge Variant
This is the [040] mold variation, which has a smaller wire ridge, a more pinched saddle groove running from front to back (perpendicular to the embossing) and is also 1/8" taller. The embossing is also the newer, small stamped style. This mold appears to only have been made in 1947.
Personally, I feel this mold variation is significant enough to warrant its own CD number (such as 220.1).
