Vintage PTC Instruments Model 575 F Surface Thermometer

PTC Instruments Model 312F Magnetic Surface Thermometer

PTC Instruments Vintage 313FRR Magnetic Industrial Rail Thermometer 0°F to 160°F

Vintage PTC Instruments Model 578 F Surface Thermometer

PTC Instruments 309F Surface Thermometer Minus 50-250F Degrees Vintage Model

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

REOTEMP Model H Thermometer 0-200 Degrees, 4 Inch, #1B (1/2 NPT) NOS NIB Vintage

PTC Instruments 313FRRMM 0-500*F Magnet Railroad Surface Thermometer