Precision Apparatus Co. Model 612 Tube & Battery Tester; includes the Operating Instructions and the Supplementary Tube Data book (very important tube type resource including the ECC versions, etc).
Excellent interior condition (the exterior wood is original and it has the usual scratches, etc. but it can be sanded, etc. I did not want to do it because it's original and otherwise in such good condition)
Good meter glass, perfect knobs, buttons, etc., Really big easy to read meter, etc. Can test diodes, triodes, rectifiers, tetrodes, pentodes; checks for cathode leakage, noise test pin jacks, ballast tests, etc. D'Arsonval double jeweled meter. Vintage, but easily beats buying a $300+ "modern" tester with less features.
I purchased it from Will Vincent and have used it to test a variety of tubes for my AU-111. I really don't need it inasmuch as I will only keep that one tube amp and have built up a "supply" of all of the necessary (and tested...) tubes that I would use over the next few years.
I believe HarryO is familiar with this tester, and he recommended Mr. Vincent to me last year for finding a good tube tester.
$165 plus shipping. email me through the Forum system if interested.
He has truth; the wheel of time may roll whither it pleases, never can it escape from truth. It is important to hear that such have lived. All Hail Hypno Toad!!!