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Siemens

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Siemens Elm24
Siemens Siemens Elm24Siemens Siemens Elm24 
Year: 1924
 Type: ribbon
One of the first microphones for recording sound to sound movies. 
Siemens SM2
Siemens Siemens SM2Siemens Siemens SM2 
Year: 30th
 Type: carbon
Very old carbon camera microphone.  
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