"Home-/ Office phones with line selector (Devices with plug-in or push-button line selector)"
(The large picture changes on "mouse over" the number of the phone or the circuit diagram).

Picture
System overview: plug-in 218
1913 Catalog number 5250 5270 5290 5295 5330
Circuit number: 201 210 210 210 209
System overview:push-button 247
1913 Catalog number 5500 5530 5550 1914 Catalog number 5450
Circuit number: 243 244 244 JS-3
1924 Catalog number 5215 5216 5217 5235
1932 Catalog number 5215 5235 7930