Geophone

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Item Geophone
Item code
Description
Manufacturer
Circa
Model
Donor Charlie Klutts
Location HGC
Serial number NMI-3"NMI" can not be assigned to a declared number type with value -3.
Taxonomy IMG2154
  1. 3. NMI. Cable entry is made through carved fiberboard block to soldered connections. No other markings visible.

GSH IMG2154.jpg