Geophone 100
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| Item | Geophone 20D Blu Sm winter base |
|---|---|
| Item code | |
| Description | cutaway, Stand |
| Manufacturer | Geospace |
| Circa | |
| Model | |
| Donor | ION/Sensor |
| Location | Houston Geoscience Center |
| Serial number | |
| Taxonomy | S044 |
Amplifier tube on bottom, damping coils and unknown adjustment disks. 12 inches.
