Hot Rods What are these tools?

I have a couple of tools that are unknown to me and everyone I have asked....maybe someone on this site can help me identify them.

 

Flux capacitor lagging measurer

 

Those were stolen from the Manhattan project!

 

If there is a sight glass at the bottom of the spark plug tool, it was probably hooked up to compressed air and the valve was used to similate a combustion chamber to see if the plug would break down when the valve is opened. The bracket would be grounded, and a plug wire would be hooked to a coil. We had a tester that would do the same thing and also test coils in marine motors class in high school

 

Looks like parts to a spark plug cleaner that uses compressed air.

 

Yes, it has a sight glass opposite of the spark plug location....upspirate, I think you are on to something......I have had several folks suggest that it is some sort of spark plug cleaner, but the sight glass remains crystal clear......and the other tool?

 

The other tool might be a ball joint gauge.

Had something like this at a dealer I worked at on the “ old tools shelf” you are missing some rods and bell cranks and such that sit in the hole on the arm that swings and the black base should have markings on it

 

I don't think that it could be a spark plug cleaner. The glass would fog up quick from the sand blasting it. I think it's from a spark plug tester. It looks remotely like it could be from something from this.

 

I watched a video the other night when this subject came up....can't find it now.
Here's a tester that has a very similar casting and shows a restored tester.The one I saw the other night had a cleaner in the cabinet also
Scroll through the pics:
https://picclick.com/Vintage-Champion-Spark-Plug-Tester-202382597117.html