This tach came with my PA11 project, it was overhauled by Keystone. It recorded the hours to fast so I decided to replace it. My assumption is that it is calibrated at 2100 RPM, label partially missing. I gave Keystone the wrong RPM for the red line, I just left it that way, I knew where it was supposed to be. $250 + shipping. I may require you to send your earlobe or little finger to prove you are not a scammer, or just message me.
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