[Trade Journal]
Publication: Western Electrician
Chicago, IL, United States
vol. 5, no. 16, p. 214, col. 2
Business Mention.
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The Knapp Electrical Works, Chicago, are shipping a large number of annunciators, both for hotels and private residences. There is a big demand for their hotel annunciators which are certainly models. The design and workmanship are of a superior order.
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