Mullard Magic: For All Your Vintage Valve and Radio Needs!
5R4GY, RCA, BROWN BASE, SMOOTH ANODE, APRIL 1944 PRODUCTION
5R4GY, RCA, BROWN BASE, SMOOTH ANODE, JUNE 1949 PRODUCTION, 0-26 DATE CODE,
5R4GY, RCA, BROWN BASE, SMOOTH ANODE, JUNE 1953 PRODUCTION
5R4GYB RCA HARRISON T9 ENVELOPE
5R4WGA, CHATHAM ELECTRONICS, JAN-CAHG, BLACK LADDER ANODE,