Keystone Telephone Company of Pittsburgh - TCI Library https://www.telephonecollectors.info/index.php/browse/document-repository/catalogs-manuals-educational-docs-by-company/keystone-telephone-company-of-pittsburgh?format=html Fri, 07 Jan 2011 13:51:33 -0800 en-GB hourly 1 Keystone Telephone Company Exchanges https://www.telephonecollectors.info/index.php/browse/document-repository/catalogs-manuals-educational-docs-by-company/keystone-telephone-company-of-pittsburgh/3698-keystone-telephone-company-exchanges?format=html Keystone Telephone Company Exchanges photo showing Main, North, East, West, Park and Race exchange buildings in Philadelphia.  Contributed by Steve Cichorsky.

]]> https://www.telephonecollectors.info/index.php/browse/document-repository/catalogs-manuals-educational-docs-by-company/keystone-telephone-company-of-pittsburgh/3698-keystone-telephone-company-exchanges?format=html photo showing Main, North, East, West, Park and Race exchange buildings in Philadelphia.  Contributed by Steve Cichorsky.

]]> (Anonymous) Keystone Telephone Company of Pittsburgh Fri, 07 Jan 2011 13:51:33 -0800