Not sure if this would be of any use to anyone here but, I figured I would post it anyway. I have an old(maybe 1950s-60s) thermometer/temp gauge. I tested the accuracy and it can vary by five to ten degrees from my digital thermometer(see photo Digital-191 F vs Gauge-184 F). This may be better once the unit is properly attached as no cold outside air would hit it but, I truly have no clue. Could be used on a boil kettle or as a cool desktop item. I want $15 or the best offer for it and I'll cover the shipping costs. Thanks!