2012.046.075
Envelope
Salmon-colored envelope for wireless messages sent and received by Thomas E. Clark's wireless telegraph system. The envelope has a form on the front with spaces for the addressee, the telegram number, and for charges. "Clark Wireless Telegraph-Telephone Co., Inc., Main Office: Detroit, Mich, U.S.A., Laboratory and Works: Northwest Corner Cass and State Streets." is printed along the bottom of the envelope.
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