Geophone

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Item Geophone
Item code
Description
Manufacturer McCullum Expl.
Circa
Model
Donor Charlie Klutts
Location HGC
Serial number NMI-1"NMI" can not be assigned to a declared number type with value -1.
Taxonomy IMG2152
  1. 1. NMI. McCullum Exploration used for early refraction shooting. No other marks visible. At left is complete unit and, at right, is inside basic unit. Basic unit has elaborate six spring suspension.

GSH IMG2152.jpg