Mullard Magic: For All Your Vintage Valve and Radio Needs!
U50, MARCONI OSRAM, BLACK BASE, HAMMERSMITH 1949 PRODUCTION,
U50, MARCONI, DOVER, DECEMBER 1952 MANUFACTURE, SCARCE
U50, MARCONI, BROWN BASE, JG, HAMMERSMITH JULY 1953 PRODUCTION,
U50, OSRAM, BLACK BASE, HAMMERSMITH 1950 PRODUCTION,
5Y4G, HYTRON, WHITE BOX
5Y4G, NATIONAL UNION, WHITE BOX