Geophone

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Item Geophone
Item code
Description
Manufacturer Electro-Tech Labs
Circa
Model
Donor Charlie Klutts
Location HGC
Serial number NMI-22"NMI" can not be assigned to a declared number type with value -22.
Taxonomy IMG2173
  1. 22. Cap is stamped with ELECTRO TECH logo, script letters within an oval. 383817 32 W8 is stamped around the side of the case. Flat base unscrews to provide a threaded stud for spike or other coupling attachment.

GSH IMG2173.jpg