ARDD5, MULLARD BLACKBURN WARTIME, VR54, CV1054, FOR RCA AR88, WS19, 19 SET, WS22, R1475, R206, R1132, R1359, WS38, WS46, WS62, WS68, 6AC7 NIB, R1948, AN/APR-4, HALLICRAFTERS S20R, T1509
ARDD5, MULLARD BLACKBURN WARTIME, VR54, CV1054, FOR RCA AR88, WS19, 19 SET, WS22, R1475, R206, R1132, R1359, WS38, WS46, WS62, WS68, 6AC7 NIB, R1948, AN/APR-4, HALLICRAFTERS S20R, T1509
Rare tropicalised bulb variant