Power Instruments Inc Model C-891 Portable Optical RPM TACHOMETER with case

Antique Vintage O. Zerickow Co. NY RPM Tachometer Model #88007 With Case

Vintage Appliance Tester Model 680 Instrument Design Inc Chester New York

Portable Handheld Tachometer for Petrol Engines Inductive RPM Measurement Meter

COLE-PARMER Tachometer Model 8213-20 with Carrying / Storage Case - Used

Vintage Abbeon Cal, Inc. AB74 Photo-Tach Meter 2400-12000 RPM

Vintage James Biddle Tachometer Model 359915

VINTAGE HERMAN H STIGHT 303 HAND HELD DIAL TACHOMETER RPM , 30-12000