Para Dynamics Digital Frequency, Counter

OPTOELECTRONICS OPTO-7000 FREQUENCY COUNTER - No Power cord

BK PRECISION 1803 B FREQUENCY COUNTER powers up no testing done

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

Simpson 7026 Universal Electronic Counter Frequency Timer Test Equipment

Digi Tune 1 Frequency Counter Meter Guage CB Hamm Scanner Electronic

Hewlett Packard HP 5383A Frequency Counter 520 MHz, working

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