Seismograph
1968.0902.001
Weight
1968.0902.002
Seismograph part
1968.0902.003
Boom part
1968.0902.004
Boom part
1968.0902.005
Recorder, seismograph
1968.0902.006
Recorder part
1968.0902.007
Recorder part
1968.0902.008