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M-Series - Plant



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M25.75MT Add. IB-se M25.75MT Add. IB-se

Date added: 12/03/2009
Date modified: 12/03/2009
Filesize: 178.36 kB
Downloads: 1199

Addendum, Issue B, 1953-06-01

M25.75MT IC-se M25.75MT IC-se

Date added: 12/03/2009
Date modified: 12/03/2009
Filesize: 1.1 MB
Downloads: 1408

Power Supply Arrangements - P.B.X.'s, Station Systems and Key
Equipments - General Requirements, Issue C, 1946-09-01

(Note: The MT isn't officially part of the BSP number but SE is using the
9-digit plant series method of numbering for clarity.)

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Telephone Collectors International was incorporated under the laws of the state of Kansas on May 13, 1986. The goal of the organization is "to educate the public, as well as the members of the Corporation, regarding the history of telephony, the value of old telephones and related items, their collectability and preservation; to research telephone history and publish and provide literature thereon; to promote the public exhibition of old telephones and related items; and to promote common courtesies and guidelines for use by the public." Telephone Collectors International is recognized by the Internal Revenue Service as a 501(c)(3) organization, to which U.S. tax deductible contributions can be made.