"Early bakelite telephones"
(Click at the pictures to see a real version of the phone).

Picture 4101, click for a real version, private collection
 1928

Model 'W 28' Automatic table
telephone, introduced in 1928
- case of iron and bakelit
- bakelit-handset
- telephone and carbon microphone
- induction coil
- dial switch
- polarized ringer
- capacitor
1928

Model 'W 28', Automatic wall
telephone, introduced in 1928
- case of iron
- bakelit-handset
- telephon and carbon microphone
- induction coil
- dial switch
- polarized ringer
- capacitor
Picture 4102, click for a real version, private collection
Picture 4103
 1933

Model 'OB 33' Magneto table
telephone, introduced in 1933
- case of iron and bakelit
- bakelit-handset
- telephone and carbon microphone
- induction coil
-magneto calling
- polarized ringer
1946

Model 'OB 46', Magneto table
telephone, introduced in 1946
- case of iron and bakelit
- bakelit-handset
- telephon and carbon microphone
- induction coil
-magneto calling
- polarized ringer
Picture 4104, click for a real version, private collection