A small round voltmeter with a point at the bottom and a piece of metal attached with a screw at the top. On the front there is a small window showing a paper chart of numbers from 0 to 50 and counting up by 10's below is a needle and at the top is a marking that reads "VOLTS" on the back is a patent that reads "MADE IN S.A., PAT'D OCT. 3 1916"
A small round voltmeter with a point at the bottom and a piece of metal attached with a screw at the top. On the front there is a small window showing a paper chart of numbers from 0 to 50 and counting up by 10's below is a needle and at the top is a marking that reads "VOLTS" on the back is a patent that reads "MADE IN S.A., PAT'D OCT. 3 1916"
