USA Tung-Sol 12L6GT amp tube looks and testNOS (B&K 707 tested) You are buying 1 vintage USA Tung-Sol 12L6GT tube, no original box but otherwise looks and tests like-NOS. tested perfect 100 and @63ma plate current No shorts/leakage/gasphotos show tube being testedTest results on my professionally calibrated B&K 707 mutual conductance tube tester and without shorts or leakage. [INV2]