Vintage Grass Medical Instruments Force-Displacement Transducer FT10 4M73P3

Grass Instruments FT10 Force-Displacement Transducer W/ Case & 2 RED Springs

GRASS MEDICAL INSTRUMENTS FORCE DISPLACEMENT TRANSDUCER FT03 in/wood Case #1

Grass FT10C Force-Displacement Transducer w/ Case, Springs – USA Made

GRASS MEDICAL INSTRUMENTS FORCE DISPLACEMENT TRANSDUCER FT03 in/wood Case #2

Grass FT03C Force Displacement Transducer (No Accessories)

GRASS INSTRUMENTS VOLUMETRIC PRESSURE TRANSDUCER PT5-B w/ WOODEN CASE

Grass Instruments FT03C Force-Displacement Transducer W/ Case & Multiple Springs