Here are the schematics for the Northern Electric N1717CG wall-mounted subscriber set. This telephone is an anti-sidetone instrument that uses a local battery operated transmitter and a magneto for signaling.
The circuit is in principle similar to the Western Electric 400K subscriber set (http://www.classicrotaryphones.com/forum/index.php?topic=12301.0) and the 307 desk telephone.
The components of the N1717CG are:
wood enclosure
104A induction coil
195AN condenser (dual, 1 µF and 0.6 µF)
B1N ringer
41BN hand generator
F1 handset
N1G push-button key
63KN resistance
N143Y switchhook
T/B/cont.