Two GDA or GDC geophones
- Made:
- 1950-1953
Two GDA or GDC geophones, (1 pressure-sensitive, one velocity), 1950-53
Details
- Category:
- Geophysics
- Object Number:
- 1985-1426
- type:
- geophone
- credit:
- Seismograph Service (England) Ltd.
Two GDA or GDC geophones, (1 pressure-sensitive, one velocity), 1950-53
