This is a rare Signal Corps

This is a rare Signal Corps. ZM-3A/U analyzer. It will check even big capacitors up to 10000 mf.; it was made in 1954 and is tube type and very well made. I do not have a manual for it, but it is easy to figure
how it works from the front panel. I have been using it for years on my test bench and hate to get rid of it, but need the money.: It was working well when last used.