Ludlum Model 12-4 Count Ratemeter Geiger Counter Radiation

This auction is for a Ludlum Model 12-4, serial number 141290 radiation survey meter. I have done limited testing on this Federal government surplus item - as you can see in one of the photos, it responds to my Cs137 source (source, batteries, cable, and detector are not included in sale). Case has scuffs and paint wear from use. I will guarantee working condition, but buyer would be responsible for any calibration. I would certainly give the buyer a 14 day right of return for any reason, less shipping.