For sale is a military surplus 6 digit BK Precision 1850 Frequency Counter. Frequency ranges are 5hz-60 MHZ, and 10-520MHZ prescale. Can be powered by 12 volt or 120 volt. Has external time base output.
This unit powers up and is untested beyond that. Sold as is. Please note that power cable is not provided, it uses an old style 3 prong connection. You can easily solder your own, I can do it for you for $15 (a great way to make $15 in 5 minutes).