CD 248/311/311: USA

(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

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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