Case for field seismograph vertical pendulum from Mintrop refraction seismograph for geophysical prospecting

Box of tools and mirrors from Thyssen Gravity Meter

Photographic registration apparatus from Mintrop refraction field seismograph for geophysical prospecting

Legs from tripod stand from Mintrop refraction seismograph for geophysical prospecting

Upper section of tripod stand for photographic registration apparatus, from Mintrop refraction seismograph for geophysical prospecting

Vertical pendulum from Mintrop refraction field seismograph apparatus for geophysical prospecting

Micrometer from Thyssen Gravity Meter

Box of accessories from Thyssen Gravity Meter

Hinged plane from Thyssen Gravity Meter

Mintrop field seismograph, recording apparatus and box, for geophysical prospecting

Mintrop refraction field seismograph with recording apparatus, for geophysical prospecting

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