PTC Instruments 310F Surface Thermometer 0-300F Degrees Vintage Model w/ Case

PTC Instruments Model 312F Magnetic Surface Thermometer

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

Vintage PTC Instruments Model 575 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

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

PTC Instruments Surface Thermometer 0'F to 250'F Model 486F New