When I opened the crate containing shelf brackets I found stuff that I had totally forgot about.
First up is a Snap-On MT-401A Regulator Tester
2nd is a Hanson Hawk Diagnostic & Tune-up Analyzer
3rd is an old timing light that has no name on it and the only feature is the trigger button.
These came in a Craftsman roller stack I bought off a co-worker back in the early 90's whose dad had died. I had boxed them up and never used them.