Replica of W. Siemens' electro-dynamic microphone
Replica of W. Siemens' electro-dynamic microphone, 1877
Details
- Category:
- Telecommunications
- Object Number:
- 1958-222
- type:
- replicas
- credit:
- Siemens & Halske AG
Replica of W. Siemens' electro-dynamic microphone, 1877