Heathkit IM-2410 Digital Frequency Counter

Heathkit IM-4100 (EIA-416) Digital Frequency Counter Ham Radio

Heathkit IM-2400 Frequency Counter LED 50/500MHz POOR CONDITION BATTERY CORRODED

Healthkit IM-2410 Digital Frequency Counter - Tested - up to 275 Mhz

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

Monsanto 150A Automatic Counter Frequency Counter 5Hz–32MHz Vintage Test Equipme

Simpson 7026 Universal Electronic Counter Frequency Timer Test Equipment

Heathkit EIA-416 Vintage Counter - Good Condition - Powers On