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AECo 10-A1 Ad

AECo manufactured an external key adapter (86-A) to convert a
single-line telephone for key system operation. It was their version of
WECo's 6040/6050-series keys which General Telephone also purchased for
this application.AECo manufactured an external key adapter (86-A) to convert a
single-line telephone for key system operation. It was their version of
WECo's 6040/6050-series keys which General Telephone also purchased for
this application.

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