Pretty cool old school leak down checker and also a sun top dead center indicator with the light that always gets lost. Cleaned up the gage face best I could, could not find another vac gauge but it works fine. The TDC checker is pretty cool, find tdc on number one put it on the rotor or dist shaft and clip light to the coil and ground, should be lit, mark the position of the dial then move the crank to the next position when it lights you are at tdc to do the leak down check, love 1960's technology. Asking 175 for the set OBO
