. "HALL ELECTRIC LIMITED" . "1954-11-17" . . . "data deposito: 17/11/1954" . "HALL ELECTRIC LIMITED"^^ . . "123174" . . . . . "MR118127" . . "data deposito: 17/11/1954" . . "

VALVOLE RADIO

" . "BREVETTO PER MARCHIO DI PRIMO DEPOSITO" . . "HALL ELECTRIC LIMITED" .