Military quality check passed (rhombus ). Roetest does this quickly and with great precision. Matched Pair 6P15P-EV/EL83/SV83/ TESTED WITH ROETEST BY CURVES NOS/NIB. You are looking at a matched pair of NOS 6P15P-EV, best selected by curves using Roetest V10 professional tube testing system, the best tube tester that exists now, a wonderful device.
