Exhibit 282 is a type SF2 voltmeter enclosed in a polished wood box with a leather handle; the dial runs from 0 to 15 volts in steps of 0,2 volts. The flat pointer is reflected in a mirror on the front face to permit avoiding parallax error. The terminals are on the top and there is a screw on the front for zero correction.
ISCRIZIONI
Una targhetta avvitata sullo strumento porta la seguente iscrizione: Amperometro tipo SF2 Nr 23423 Officine Galileo Firenze.