AIRCRAFT WIRELESS RECEIVER AIRCRAFT WIRELESS TELEPHONE TRANSMITTER AMPLIFIER & DETECTOR AMPLIFIER TYPE 91 BELLINI-TOSI DIRECTION FINDER BELLINI-TOSI RADIOGONIOMETER BILLI CONDENSER BUST OF MARCONI CARICATURE OF MARCONI CIVILIAN GENTLEMAN'S SWORD & HAT COHERER / RECEIVER (1) COHERER / RECEIVER (2) COLD CATHODE RAY TUBE COMMEMORATIVE PLATE CRYSTAL A RECEIVER CRYSTAL RECEIVER 31 CRYSTAL RECEIVER TYPE 16 CRYSTAL RECEIVER TYPE 31c CRYSTAL RECEIVER TYPE 31c: AERIAL TUNING INDUCTANCE COIL DIRECTION FINDER DIRECTION FINDER TYPE 11f DIRECTION FINDING RECEIVER TYPE AD 16 ENRICO SILVANI MEDAL EXHIBITION MEDAL 1899 EXHIBITION MEDAL 1902 EXHIBITION MEDAL 1908 EXPERIMENTAL OSCILLATION DEVICE FLEMING OSCILLATION VALVE FLEMING VALVE (1) FLEMING VALVE (2) HEADPHONES FOR CRYSTAL SET 18 INCH INDUCTION COIL INSTITUTE MEDAL 1922 INSULATOR: 'BRADFIELD' LEADING-IN INSULATOR JOHN FRITZ MEDAL 1922 KITE KRYHA CIPHER MACHINE LARGE LEYDEN JAR LEYDEN JARS (1) LEYDEN JARS (2) 'LONG TOM' MAGNETIC DETECTOR MAGNETIC RELAY KEY MARCONI FIVE-VALVE RECEIVER MARCONI LIFEBOAT TRANSMITTER MARCONI OTOPHONE MARCONI RECEIVER TYPE 226B MARCONI WIRELESS DIRECTION FINDER MARCONIPHONE CRYSTAL JUNIOR RECEIVER MARCONIPHONE SCREENED GRID SIX RECEIVER TYPE 61 MARCONIPHONE TWO-VALVE RECEIVER TYPE 21 MARCONIPHONE TWO-VALVE RECEIVER TYPE V2 MARCONIPHONE UNIVERSAL BABY CRYSTAL RECEIVER MARZI MICROPHONE MEDAL FROM ROERICH MUSEUM MEDAL OF INTERNATIONAL MARCONI CONFERENCE MEDAL OF PORTUGESE MARCONI COMPANY MODIFIED CRYSTAL VALVE RECEIVER MORSE KEY (1) MORSE KEY (2) MORSE TAPE INKER MULTIPLE TUNER MULTIPLE TUNER & MAGNETIC DETECTOR NEWTON INDUCTION COIL (1) NEWTON INDUCTION COIL (2) OPERATOR'S WATCH OSCILLATOR - SPARK GAP PARABOLIC REFLECTOR FOR RECEPTION PARABOLIC TRANSMITTER PERFUME BOTTLE PORTABLE AIRCRAFT SPARK TRANSMITTER PORTABLE DECREMETER PORTABLE VALVE TRANSMITTER PORTRAIT OF MARCONI (1) PORTRAIT OF MARCONI (2) PORTRAIT OF MARCONI (3) PORTRAIT OF MARCONI (4) PROOF PRINT OF MARCONI RIGHI OSCILLATOR ROTARY SPARK DISCHARGER SEVEN-VALVE RECEIVER SHORT WAVE RECEIVER SIDE-LEVER MORSE KEY SILVER TABLE LIGHTER SPARK GAP TRANSMITTER (1) SPARK GAP TRANSMITTER (2) SYKES MICROPHONE TELEPHONE ARC TRANSMITTER TELEPHONE RECEIVER THE YACHT ELETTRA TILTING BOARD TRANSATLANTIC COHERER TRIPLE X-STOPPER TUNED CIRCUIT TRANSMITTER TUNED FIELD TRANSMITTER TUNED TRANSMITTER TUNING CONDENSER (1) TUNING CONDENSER (2) TYPE CA' TRIODE VALVE VALVE AND CRYSTAL RECEIVER VARIOMETER 4 VOLT FLEMING VALVE 12 VOLT FLEMING VALVE WIRELESS SPARK GAP WIRELESS TELEPHONE SET TYPE TT2