ARMSTRONG'S T.W. // MADE IN U..S.A.
Picture Courtesy Bob Berry
Rubber shed in place as per patent
Picture Courtesy Bob Berry
CD 203.2: USA
Picture Courtesy Bob Berry |
Picture Courtesy Bob Berry |
This unusual CD is a transposition designed to have a rubber shed between the two wires. It was designed to an E.J. Bonnesen patent in 1956.
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