A long ramble, starting with trying to find the Hot Well of Hotwells and leading up the side of the Avon Gorge to the Downs and then through Clifton for coffee.
The Avometer brand multimeter was popular for decades; first made in 1923, the last one was produced in 2008. AVO stands for Amps, Volts and Ohms, the three things this multimeter can measure.