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 Model 309F Surface Temperature Thermometer Minus -50°F to Plus +250°F

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

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