Mullard Magic: For All Your Vintage Valve and Radio Needs!
MARCONI, ML4, TRIODE OUTPUT VALVE, MESH ANODE, GLOBE ENVELOPE, FOR PX4 AMP
ML4 MARCONI OSRAM ST SHAPED TESTED
ML4, MARCONI OSRAM, AIR MINISTRY, 10E/17,
ML4, MARCONI OSRAM, ST SHAPED, TESTED
ML4, MARCONI, LARGE OVAL CARTOUCHE