Vintage DSI Model 3550 Frequency Counter 50 Hz-550MHz Powers On

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

One GoldStar FC-7102 Frequency Counter Vintage Lab Test Equipment Powers On

Fluke Frequency Counter - Model 1900A - 5Hz to 80Mhz - Turns On

Optoelectronics Frequency Counter Model 7010A - 600 MHz Untested

Heathkit IM-4100 Digital Frequency Counter Powers On Ham Radio Test Gear

HP 5381A Frequency Counter 80MHz Vintage Digital Display * turns on

OptoElectronics Model: FC-50C Frequency Counter Used Working