Boston: Holtzer-Cabot, n.d. (c. 1940s). Paperback. An advertising piece for an early executive control system from Holtzer-Cabot Electric, a Boston company specializing in motors, telegraphs and telephones, and fire alarm systems. They closed in 1972. A four-page folder on card stock with pictures of the phones and speaker, and a detachable postcard for requesting more information. Very good condition. Science and technology SCI/020215. Very Good.
September SALE! All books in Education, African History, and Science & Technology sections priced at $100 and under are 30% off for the month of September.
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