(CD 249) HEMINGRAY // No 79
(CD 311) No markings
Picture Courtesy Bob Berry
CORNING PYREX REG.US.PAT.OFF
MADE IN U.S.A.
Picture Courtesy Bob Berry
(CD 249) HEMINGRAY // No 79
(CD 311) No markings
Picture Courtesy Bob Berry
CD 248/311/311: USA
(CD 311) No markings
Picture Courtesy Bob Berry |
MADE IN U.S.A.
Picture Courtesy Bob Berry |
(CD 311) No markings
Picture Courtesy Bob Berry |
This stacking high voltage insulator was made by Hemingray (shown) and Corning (Pyrex). The amber bases are assumed to be replacements for the original Hemingray marked aqua bases. These are scarce and it is not sure what glass house made these.
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