"CB-Phones for lampswitchboards"
(The large picture changes on "mouse over" the number of the phone or the circuit diagram).

Picture
System overview: Schema 9112/100
1913 Catalog number 5601 5603 5604 5605 5608 5609 5610 5611 5613
Circuit number: 177 178
1924 Catalog number: 5404 5405 5421 5425/26 5429 5440/41 1925 Catalog number: 5484
Circuit number: AS-300 AS-300 AS-300 AS-300 AS-300 AS-300 AS-300
1932 Catalog number: 5405 7900/01/02/03
Circuit number: AS-300