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Chest Plate Micrphone

One thought on “Chest Plate Micrphone”

Len Arzoomanian says:

August 2, 2018 at 11:07 am

Patented in USA Jan 14, 13
Patents applied for

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Maker

Western Electric Co. Inc.
1913

Specifications

D1433 on Chest Plate, D14293 on Mic

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