All AMPed Up
This was shot at Bernardo Winery in San Diego – this place is a gem for local Photographers, loaded with all manner of artifacts.
This is a control panel for adjusting DC Voltage and Current. The large knob at the bottom likely switched the ranges of the Voltage and Amperage Scales, and the knob to the right pehaps did some fine tuning. I think this may have been for an electric fence or maybe millitary gear?
Some research shows that it was manufactured by the Hickok Electrical Instrument Company in Clevland, Ohio which was founded in 1910. Many of their instruments were used on Submarine Destroyers in WW2 and later for Vacuum Tube testers during the early days of Radio! www.kerstenbeck.com