TACHOMETER/3 1/8 (No Internal Hour Meter), 0-3500 RPM, 1.5 Pulse/Rev, with Color Markings. TSO'd T19-801-10CNUMA Tachometer | 3-1/8 in, 0–3500 RPM, 1.5 pulse/rev, Color Marking, TSO C49b, No Internal Hour MeterUMA TSO certified analog tachometers are designed for most Continental and Lycoming eng..