Hunnan Shuguang. 1 x 5AR4/GZ34 Tube. Made in China.
Test results will vary between testers as it is not an exact science. I also use variac at 120 volts with my testers. Mutual Conductance (GM)Test: 52 & 53 (58 = NOS AVERAGE & 40 = Good MINIMUM). Gas (Grid Current)Test: Passed.