Illustrated circular of Holcomb's new amplifying telephones!
Publisher: J.R. Holcomb & Co.
Published: 1881
Place of publication: Mallet Creek, Ohio
Language: eng
Subjects: Catalogs; Telephone supplies industry; Telephone; Equipment and supplies; J.R. Holcomb & Co
Notes: Also a business envelope mailed out by the firm, and broadside: Holcomb's improved automatic telephones.