OK, here we are. It's a bit worn on the front, meaning it's apparently been used a lot. Everywhere fingers could have touched, or stuff could have rubbed against it, it probably did.
The rest of the unit is surprisingly free from scrapes, nicks, etc. though, and all the controls seem to work well. One thing which caught my interest is the sticker which indicates it spent the latter part of its life at NASA Lewis Research Center (now NASA Glenn). Someone bolted a sturdy handle on the top panel, so I guess it was the roving metrology department for the Center's lab benches. Or maybe they used it for the big things like the wind tunnel data acquisition bays which couldn't easily be disassembled and carried to the met lab.
It has the standard IEC power inlet on the back, which I take it means it's a later model (sn116A02301,
not marked "Harrison Labs") and the fuse holder is cracked and barely holding together (I managed a further $25 off the already low sticker price). I took a look online when I was thinking about buying it, and saw them going for 3-4x what this guy was asking, so I took the risk.
It does power up and emits a noticeable hum, but the voltage output works in AC and DC mode on the ranges up to 100V - The dial changes voltage smoothly and precisely, albeit it's noticeably out of cal on the low side. That, plus the hum, speaks to me of bad power supply caps and maybe other things yet unseen. It is going to need a thorough cleaning; the top board has a layer of ancient greasy dust on it and the vinyl coverings are tacky. I'm thinking about removing the handle too; the top cover is not designed to carry the entire weight of the meter and has already bowed from the stress. And of course installing a proper screw-on fuse holder.
I've got a couple of pieces of gear in the queue at the moment, so I'm not sure when this one will get to the front, but I think I'm just going to add the caps to my upcoming parts order so I won't need to panic-order any replacements when I do pull the boards out.