Vintage Frequency Counter Model Regency Model EC-175 Frequency Counter (175Mhz)

HP 5313A Universal Counter 150MHz Frequency Time Period Lab Test Equipment

KEYSIGHT/Agilent/HP 53132A 225 MHz Universal Frequency Counter OPT 10

BK Precision Dynascan Corporation 1822 175 MHz Universal Counter

Vintage Frequency Counter Model Regency Model EC-175 Frequency Counter (175Mhz)

E&L 175mHz DIGITAL UNUVERSAL FREQUENCY COUNTER FC-01 Tested Working

BK Precision DynaScan 1822 Universal Counter 175 MHz.