I know this is not a lot of information, but a family member has an antique polygraph in the basement they might give to me. It looks complete and nice. I was told it worked years ago. I will get a brand etc later. I'm kind of a antique / tech junkie and thought it migut he fun to get working and restore if / as needed. I know it's old.. Has brain leads and is the size of a small piano. I see tubes etc inside so must be fairly old. Prop take 2-4 guys to move upstairs. Anyone have any idea what this is, the possibility of restoring it or what it's worth? Is it worth getting working? All I know is it looks awesome, 

Just fishing before I bring this monster into my shop.

Thanks in advance

Brain leads? Small piano? Please provide a few pictures.