BK Precision Model 1856C 2.4 Ghz Counter, Tested ?? (SEE DESCRIPTION & PHOTOS)

Vintage BK Precision 1820 Universal Frequency Counter

Vintage BK Precision 1850 Universal 6 Digit Frequency Counter

Vintage DSI Model 3550 Frequency Counter 50 Hz-550MHz

HP AGILENT 5314A UNIVERSAL COUNTER / Hewlett Packard / Made In USA / READ DESC

BK Precision 1823 Universal Counter

Vintage REDCO RFC-50 Frequency Counter Electronics Untested

HP 5314A Universal Frequency Counter Parts (Powers On, Untested)