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Also known as: Chamber of Commerce; Keystone Telephone Co. Exchange (1902-1944)
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[Commercial Exchange] (1875) Local ID #: Westcott1875-143 Westcott, Thompson. <i>The Official Guide Book to Philadelphia</i>. Philadelphia: Porter & Coates, 1875., p. 143 [Commercial Exchange]
(1875)
Local ID #: Westcott1875-143
Westcott, Thompson. The Official Guide Book to Philadelphia. Philadelphia: Porter & Coates, 1875., p. 143
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