This unit has had the original movement replaced with a quartz movement. It has been meticulously rebuilt by the best in the business and features a new, crystal clear lens. $150 credit when you return your clean rebuildable core with a copy of your invoice.
Quartz movement clocks have second hands that click around, original clocks had a constant sweep of the second hand.
Without the knob, cores have no value.
Check out the video below on our new gauge tester