Commercial trades institute vtvm. Anyone familliar?

[Tubejunke]

A number of months ago my lady brought home one of these VT-20 meters covered in rust to the point that the selections and other functions couldn't even be read until a long scotchbrite session allowed me to just barely see what I may select for function and range. Once I established that I found that the thing worked almost spot on. But it was so darned nasty looking that I couldn't see incorporating it onto my bench. Should I yank the tubes and trash it as I have more than enough old meters? I didn't do that, but I threw it out in the shed for the time being.

I started looking on Ebay and found that they are for sale on there quite regularly at very cheap prices. I wound up giving a guy like $12 and he sent me one in near mint condition. The darned thing is as accurate or more accurate than some of my Hickok jewels that I cherish and brag on so much. I always say that nothing beats a good old Simpson 303 or 560 for accuracy and sheer dependability, but this old VT-20 really comes close to the best of analog meters.

Just wondering if anyone here has any experience with these. The model I mention is the only one that I have seen anywhere. I assume that it comes from some school like N.R.I. or the like, but I don't have a clue.