ELECTRONICS INTERNATIONAL DIGITAL TACHOMETER P/N R-1-4-G30R270

Electronics Intl R-1 Digital RPM Tachometer Instrument P/N R-1-6-G30R270

Piper Twin Comanche Dual Tachometer Twin-Tach P/N: 57-3AW

Mitchell Aircraft 2 1/4 Tachometer Gauge

Electronics International R-1 6Cylinder Digital Tachometer with Connector

Electronics International R-1-6-G30R270 Digital Tachometer, S/N 29862

E.I. inc Digital Tachometer P:N: R-1-6G30Y245R260

Mitchell Aircraft Recording Tachometer P/N-D1-112-5023