Sun MDT distributor tester

Used these many times. This appears to be original set-up, for point ignition only. That red wire is the hot lead to the distributor, by grounding it to the chassis it shorted out. Maybe only a fuse or circuit breaker. There are adapters for some electronic distributors. These are still useful for checking dwell, vacuum advance and mechanical advance. You will probably have a dwell meter, tach, vacuum gauge. Uses 110v. Machine throws a light onto the black degree plate on the bottom to track the amount of advance. Have fun.