Dec 67. Kit of parts to be installed in customer-owned housings that conform to BTL drawing B-696501. Includes wiring diagram and installation info.  Shown installed in a United States Telephone Company US-4 French-style cradle phone.

Addendum (I1, Jun 68) shows changes made to fit a US-5 "Contessa" French-style cradle phone.

This document is full of minutiae regarding Automatic Electric, Western
Electric,  and other manufacturer's dials such as the year of
introduction, production changes, and a table of various vintages of
dial cards.

GTE PRACTICES       
SECTION 473-820-100
ISSUE 3, DECEMBER, 1973
GTE STANDARD

DIALS, FINGERWHEELS, AND NUMBER CARDS

GENERAL
This section provides information concerning the identification of
various dials, fingerwheels, escutcheons, and number cards that are
commonly used on telephone sets, data sets, Teletypewriters, test
boards, and tollboards.

DIALS
Dials in common use within the GTE system include the GTE Automatic
Electric Types : 24A36, 51, 51 A, 52, 53, 54, and 154A; the WECo Numbers
5, 6, 7, 8, and 9; the Kellogg equivalents of the WECo Numbers 7, 8, and
9; and  Stromberg-Carlson S-C Number 10A.

GTE AE dials are customarily used on GTE AE telephone sets, data
auxiliary sets, testboards, and tollboards, as well as on some Leich
telephone sets, tollboards, and certain North telephone sets.

WECo dials will to found on WECo telephone sets, data sets, data
auxiliary sets, testboards, and tollboards as well as on Teletype
teletypewriters and certain Leich and North telephone sets.

GTE usage of Kellogg and Stromberg-Carlson dials is confined to their
respective sets.

Contributed by Steve Cichorsky.