Optoelectronics Frequency Counter Model 7010A - 600 MHz Untested

OPTOELECTRONICS OPTO-7000 FREQUENCY COUNTER - No Power cord

DataScan MODEL C1400 10HZ-1..4GHZ FREQUENCY COUNTER * Untested

Lodestar Frequency Counter (FC-5250C 10Hz~200MHz) **USED VINTAGE** Turns On

Optoelectronics Frequency Counter Model 7010A - 600 MHz

BK B&K Precision Model 1823A 2.4GHz Universal Frequency Counter PARTS

OptoElectronics Model: FC-50C Frequency Counter Used Working

Radio Shack LCD RF Frequency Counter 22-306 (Powers up - Untested)