HEMINGRAY // MADE IN U.S.A.
Picture Courtesy Bob Berry
HEMINGRAY-E.1. // MADE IN U.S.A.
Picture Courtesy Bob Berry
PYREX / REG. U.S. PAT. OFF.
Picture Courtesy Bob Berry
CD 128: USA
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Picture Courtesy Bob Berry |
Picture Courtesy Bob Berry |
Picture Courtesy Bob Berry |
This style was developed for telephone carrier circuits using small steel pins. Initially Corning Pyrex glass was used and later many companies produced this style.
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