(Click at the pictures to see a real version of the phone).
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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
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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
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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
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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
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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
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