I came across this tool, and cannot identify it. If somebody can tell me what it is, please call me at 918-708-5620. Thanks, Cliff

I saw your post on Facebook ( Or was it on Garage Gazette?) . Show us the other pictures. 

The other pics.

The AC logo certainly appears to be AC Delco.  It was bench mounted, looks like turning the handle would expand a spring of some sort, beyond that, I am lost.

Part of a spark plug cleaner?

I got a guy says it is a spark plug gapper for the old Lighthouse spark plugs. They were huge, some almost the size of a toilet paper inner roll. I think the roller loosens, lets the square block with the round hole down, insert plug, raise up and lock in with roller then set gap. After that, gap was already preset for the rest of the plugs. Best theory I can come up with if this is what it is.

Maybe even for the giant plugs like in his picture. In any case, made before 1940s, closer to 1930s.

I have no use for it, as a lifetime technician working on trucks and equipment it is useless, but not worthless. I already have several conversation pieces and paper weights. I may be interested in trading for tools I could use.

Cool, Son found the whole story.  July 1942. Back at the Melrose Park Buick plant near Chicago. "Production of aircraft engines. Reconditioning used spark plugs for use in testing airplane motors, Mighnon Gunn operates this small testing machine with speed and precision although she was new to the job two months ago. A former domestic worker, this young woman is now a willing and efficient war worker, one of many women who are relieving labor shortages in war industries throughout the country." Photo by Ann Rosener, Office of War Information.

i'd like 2 purchase or trade 4 it.

cool tool,but nothing better than war effort facts!

Quote from: wrenchguy on December 13, 2015, 09:33:28 AM
i'd like 2 purchase or trade 4 it.

Give me a call, 918--708-5620