I ran across this at an estate sale sitting on a blanket at the back of the garage on a shelf! There were a few others gauges too-I have listed them separately. I have no idea if this one is working. So I am listing it cheap!  It will arrive padded up safe in a box WITH a tracking number-FREE SHIPPING inside the USA. let the pictures help you decide if you like it. No returns on this item-listed cheap due to the unknown condition! Could be fine???!