The transmitter, with Righi's oscillator, used by Guglielmo Marconi during the wireless telegraphy experimentations on July 1897 at La Spezia.

As you can see on the original transmitting station (find repert photography) located in the quarter of - S. Bartolomeo - La Spezia.

S. Bartolomeo TX - La Spezia 1897
Spark Transmitter - Used by Guglielmo Marconi at S. Bartolomeo location ,
with Righi's oscillator, Ruhmkorff coil , Morse key and battery
(1897 - La Spezia SP - Italy)