Hemingray Insulator Profile: CD 221  
This style is the largest of the "600" series, following the 670 (CD 220) and the 660 (CD 218 and 219). This is one big solid chunk of glass! 

Dimensions: 5" H x 4" W
Primary
Embossings:
• HEMINGRAY
• NO NAME
Years Produced:
c.1937-1940s
Style Numbers:68, 680
Rarity Scale (1-10): Fairly Common (4)
Usage: Primary Power Distribution
Voltage Rating: 15,000 Volts
Mold Variation Collapse

Locke Hi-Top Style

At left is the "Locke Hi-Top style" mold variation, which only appears on some earlier experimental number 68 styles. This mold variation is named after the Locke Hi-Top porcelain insulator with the same features.

There are two distinguishing features of the Locke Hi-Top style: the top wire ridge has an extra "step" and the ears are flatter.

Known Embossings (13) Collapse
 
HEMINGRAY [020] (F-Skirt) HEMINGRAY - 68/[Numbers and dots] (R-Skirt) MADE IN U.S.A./[Number] SB Photo
HEMINGRAY [030] (F-Skirt) HEMINGRAY - 68/[Numbers and dots] (R-Skirt) MADE IN U.S.A./[Number] {Locke Hi-Top style; Aluminum coated top} SB < WANTED! 
NEW! HEMINGRAY [032] (F-Skirt) HEMINGRAY-68/[Numbers and dots] (R-Skirt) MADE IN U.S.A./[Number] {Locke Hi-Top style; Aluminum coated top} {A brass bushing molded into the pinhole with a square at the top} SB < WANTED! 
HEMINGRAY [035] (F-Skirt) HEMINGRAY - 68/[Numbers and dots] (R-Skirt) MADE IN U.S.A./[Number] {Locke Hi-Top style} SB < WANTED! 
NEW! HEMINGRAY [037] (F-Skirt) HEMINGRAY-68/[Numbers and dots] (R-Skirt) MADE IN U.S.A./[Number] {Locke Hi-Top style} {A brass bushing molded into the pinhole with a square at the top} SB Photo
HEMINGRAY [050] (F-Skirt) HEMINGRAY - 680 (R-Skirt) MADE IN U.S.A./[Numbers and dots] CB Photo
HEMINGRAY [060] (F-Skirt) HEMINGRAY - 680 (R-Skirt) MADE IN U.S.A./[Numbers and dots] SB
HEMINGRAY [070] (F-Skirt) HEMINGRAY - 680/LOWEX (R-Skirt) MADE IN U.S.A./[Numbers and dots] SB Photo
HEMINGRAY [080] (F-Skirt) HEMINGRAY - 680/LOWEX/REG. U.S. PAT. OFF. (R-Skirt) MADE IN U.S.A./[Numbers and dots] SB Photo
HEMINGRAY [085] (F-Skirt) HEMINGRAY - 680/[Numbers and dots] (R-Skirt) MADE IN U.S.A./[Number] SB
HEMINGRAY [090] (F-Skirt) HEMINGRAY - 680/['LOWEX/REG. U.S. PAT. OFF.' blotted out] (R-Skirt) MADE IN U.S.A./[Numbers and dots] CB
HEMINGRAY [100] (F-Skirt) HEMINGRAY - 680/['LOWEX/REG. U.S. PAT. OFF.' blotted out] (R-Skirt) MADE IN U.S.A./[Numbers and dots] SB Photo
NO NAME [010] (F-Skirt) 68 {Locke Hi-Top style; Aluminum coated top} {Hemingray product} SB < WANTED! 

The following embossings were removed from the price guide because they could not be verified to exist:

Unverified Embossings
Year Removed
HEMINGRAY [010] (F-Skirt) HEMINGRAY-68 (R-Skirt) MADE IN U.S.A. / [Numbers and dots] SB 2003
HEMINGRAY [040] (F-Skirt) HEMINGRAY-68 / ['LOWEX / REG. U.S. PAT. OFF. blotted out] (R-Skirt) MADE IN U.S.A. / [Numbers and dots] CB 2003





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