Leader LDC-823S Digital Frequency Counter 250 MHz

Leader LDC-823S 250MHz Portable Digital Wide Range Frequency Counter/Timer

LEADER ELECTRONICS LDC-824S 520MHZ DIGITAL FREQUENCY COUNTER

Leader LDC-822, digital frequency counter, 10Hz/80 MHz, Verified Calibration

EZ Digital FC-7015U 100MHz Universal Frequency Counter with Power Cable

LEADER LDC-824S DIGITAL FREQUENCY COUNTER 520Mhz (Untested, Parts/Restoration)

Vintage USSR F5137 Frequency Counter | 0.1 Hz–100 MHz | High‑Accuracy Unit