Mullard Magic: For All Your Vintage Valve and Radio Needs!
5R4GY, BRIMAR, 3 RIBBED PLATE, BROWN BASE WITH WHITE PRINT, CV717, 5R4G
5R4GY, ELPICO, BLACK BASE, SMOOTH CHARCOAL ANODES, GREEN PRINT, DOUBLE D GETTER, CTION
5R4GY, RCA, BROWN BASE, SMOOTH ANODE, JUNE 1953 PRODUCTION
5R4GYB RCA HARRISON T9 ENVELOPE
5R4WGA, CHATHAM ELECTRONICS, JAN-CAHG, BLACK LADDER ANODE,