Mullard Magic: For All Your Vintage Valve and Radio Needs!
6X4 BRIMAR ORANGE PRINT 1959 MANUFACTURE
6X4 BRIMAR WHITE PRINT SEPTEMBER 1961 MANUFACTURE
6X4 TUNG-SOL USA 1960s MANUFACTURE
6X4, BRIMAR, LIMITED WHITE PRINT, DEC 1961 MANUFACTURE
6X4, BRIMAR, WHITE & RED PRINT, JUNE 1961 MANUFACTURE