"Home-/ Office magneto phones for switchboards"
(The large picture changes on "mouse over" the number of the phone or the circuit diagram).
System overview:
1202
1913 Catalog number:
5186
5191
5203
5209
5233
5234
5236
5231
Circuit number:
150
157
1924 Catalog number:
5308
5309
5320
5323