Two, Raytheon VT-231, JAN-CRP-6SN7GT tubes, wartime manufacture, military issue. Yellow-orange printed logo bases, black, flat plates, reinforcing rods. Outstanding sonics. Tested on a Hickok TV-3 military tester that has been calibrated. Firm bases, excellent silvering. Tubes are matched for dynamic gain and structure- test at 3125-3000 and 3125-3000 where pass/fail is 1625 micromho. They have the same structure inside and out, having matching date codes of "LE4", Mid 1944.... The top glass is absolutely clear of any emissionms deposits.Many other lots of tubes for sale this week.Shipping is free within the continental US. Elsewhere- exact postage only, no packing feee