Name of sunlight recording device

[Giovanni Paltrinieri]

There is a factory of Phisic instrument in my town, who produce this solar
device.
The name of the factory is  MECH-EL.
Address:              via Cà dell'Orbo 38
                I  40060 Villanova  BO
tel (Italy)  051-6053082
fax (Italy) 051-6053155


Giovanni Paltrinieri, Gnomonista in Bologna