[Boatanchors] OT: FW Bell "Current Gun" CG-100D

[Alex [Temple Boatanchors]]

Hi, I know this is not really a boat anchor per se, but it is kind of 
an oldy. So hope you guys don't mind my asking if anybody has any 
information (specs, user manual, etc) about said model amp measuring 
clamp? I believe these where popular during the 70s-80s (?), but not 
really sure how old it is. Could not really find any useful 
information about this model on the web. Also, anybody know if back 
in the day these where any good?

Thanks
Alex