Geophone Shell Mod LB

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Item Geophone Shell Mod LB
Item code
Description 1954-1966, 2.75Hz
Manufacturer Shell
Circa 1954
Model
Donor
Location
Serial number 5
Taxonomy VM-012

Geophone - Shell Oil Co. Model LB - Weighs 1.47 lbs.; 2.75 H; 2 inches Dia; coil resistance-900Ohms; natural frequency-15.5cps; frequency response-no parasitic below 270 cps; required planting-1st surface geophone with spike.

File:VM-012.jpg