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

Picture 491, click for a real version, private collection
1915

Model 'SA 15', (Siemens &
Halske) Automatic table
telephone, introduced in 1915
- case of iron
- handset with tin telephon and
  carbon-granule microphone
- induction coil
- dial switch
- polarized ringer
- capacitor
1919

Model 'SA 19', Automatic table
telephone, introduced in 1919
- case of iron
- handset with tin telephon and
  carbon-granule microphone
- induction coil
- dial switch
- polarized ringer
- capacitor
Picture 492, click for a real version, Museum für Post und Telekommunikation
Picture 493, no real version available
1919

Model 'SA 19', Automatic wall
telephone, introduced in 1919
- case of iron
- handset with tin telephon and
  carbon-granule microphone
- induction coil
- dial switch
- polarized ringer
- capacitor
1924

Model 'SA 24', Automatic table
telephone, introduced in 1924
- case of iron
- handset with tin telephon and
  carbon-granule microphone
- induction coil
- dial switch
- polarized ringer
- capacitor
Picture 494, click for a real version, private collection
Picture 495, click for a real version, private collection
1925

Model 'SA 25', Automatic wall
telephone, introduced in 1925
- case of iron
- handset with tin telephon and
  carbon-granule microphone
- induction coil
- dial switch
- polarized ringer
- capacitor