Pacific Transducer Corp Model 306 "D" Scale Durometer

Shore Durometer Hardness Gage Type A-2 Instrument & Mfg. Co. in Case

Slightly Used PTC INSTRUMENTS Model 412 ASTM D2240 Ergo Analog Durometer

PTC Instruments Model 306L Type A Durometer With Case USA (Cracked)

PTC Instruments 306L Type "A" Scale Durometer

Vintage Shore Durometer Hardness Gauge Type A2 w/ Case Made USA

VINTAGE PTC INSTRUMENTS 307-L TYPE D DUROMETER UNTESTED

Vintage Shore Durometer Hardness Gauge Type A2 w/ Case Made USA