Did I mention that I like tachometers? Fist tach, a Heathkit GD-69 Thimb Tach at far left Next tach was also a kit built tach. At center the Acc TachMaster. They all still work. I liked to gather up broken tachs at swaps . From time to time I give one away to a flier in need. Not letting go of the fist two though.