Two new old stock General Electric 5963 vacuum tubes in original boxes both with same JW 188-5 date code. Nice closely matched dual sections. One tube tests 3600 uMhos on each section, other tube tests 3312 and 3384 uMhos. Tested on Hickok AN/USM-118B tube tester with minimum acceptable test of 1800 uMhos. Quality replacement for 12AU7 vacuum tubes.