This field strength meter is still in my personal possession. I had it given to me in the mid 1980's. It is in great condition, though the outside of the case shows some wear. I have not tried to power it up and actually use it yet. Perhaps someday I'll rig up a set of batteries or a power supply and really check it out.
I am glad the newer ones are more portable! I would hate to have to do my present monitor points with this one!