"CB-Telephones"
(Click at the pictures to see a real version of the phone).

Picture 471, click for a real version, Museum für Post und Telekommunikation
 1906/1907

Model ZB 06/ZB 07,
CB-wall-telephone, 1906/1907
- case of brass and iron
- 1 tin telephone with ringmagnet
- carbon-granule microphone,
  adjustable for height
- induction coil
- CB calling
- polarized ringer
- capacitor
1906

Model ZB 06
CB-table-telephone, 1906
- case of brass and iron
- 1 tin telephone with ringmagnet
- carbon-granule microphone
- induction coil
- CB calling
- polarized ringer
- capacitor
Picture 472, no real version available
Picture 473, click for a real version, private collection
 1908

Model ZB 08,
CB-table-telephone, 1908
- case of brass and iron
- 1 tin telephone with ringmagnet
- carbon-granule microphone
- induction coil
- CB calling
- polarized ringer
- capacitor