German OB/ZB Telephones
German telephones for local (OB) and central (ZB) battery systems:
TF-39 - Tabletop telephone for fortresses, model 1939... more >>
MT9 - Handset of TF-39 with connector... more >>
OB-38 - Tabletop telephone for Imperial Railways, model 1938... more >>
DB1 (OB-33) - Portable telephone for post-war German railroad... more >>
DB2 (OB-33) - Portable telephone for post-war German railroad... more >>
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