Simpson
Model 303

Vacuum Tube Volt Meter
Powers up and is operational
includes leather case for protection
and storage of some leads

Input connectors have been changed out
for common BNC style connectors
the AC Volts input is direct as per schematic
The DC Volts input requires a 1 Mega Ohm series resistance

A copy of the manual can be found at
“https://www.simpson260.com/downloads/simpson_303_user_manual.pdf”

Original input connectors are included in packaging