Previous owner tested them at 1800, 1800, 1800 & 1800 on his B&K 700 tube tester. I tested them on my TV-7 and got same matching test results too. All Tubes are double tested on my 2 calibrated TV-7B/U tube testers. The recommended minimum value for these types of tubes is 46 (60%).
They tested at: ZENITH, ZENITH 76, ZENITH 76 & ZENITH 76, with no shorts. The test results are written on all tubes.