PTC Instruments Model 312F Magnetic Surface Thermometer

Vintage PTC Instruments Model 575 F Surface Thermometer

PTC Instruments Surface Thermometer 0F to 250 Degrees F Vintage Model 312F

Vintage PTC Instruments Surface Thermometer 0'F to 250'F Model 312F

Baker 314FC Magnetic Surface Thermometer, 50 to 750°F (10 to 400°C)

PTC Instruments Surface Thermometer Model 310C -10°C to +150°C

PTC INSTRUMENTS DUAL MAGNET SURFACE THERMOMETER 312FMM

Baker 312FC Magnetic Surface Thermometer, 0 to 250°F (-20 to 120°C)