DB VC3165 High Resolution Counter 0.01 Hz to 2.4 GHz

Victor VC3165 High Reolution Frequency Connter

GW GFC-801OF Frequency Counter 0 Hz - 120 MHz Good Will Instrument Co. Test

Hewlett-Packard HP 5300B High Resolution Frequency Counter Measuring System USA

HP 53131A Universal Frequency Counter/Timer 225 MHz / UNTESTED⚠️

Heathkit IM-2410 Digital Frequency Counter 10 Hz to 225 MHz Vintage Test Gear

YITENSEN VC3165 Precision Frequency Meter 0.01Hz-2.4GHz 2 AC/DC TESTED

Para Dynamics Digital Frequency, Counter