CV6 7193 half of 6SN7GT | Round black plate this excellent tube, with same characteristic as 6SN7GT x 2tubes packing Original military box with test result sticker on box, tubes... | By
CV6 @ The Valve Museum
USS Enterprise (CV-6) — Wikipédia
NATIONAL VT-232 / E1148 / CV6 Vacuum tube Triode VHF TESTED TV 7 DU | eBay