Another- what was this tool used for ?

[38 Dodge Coupe]

Ok,

The talent on this board is amazing. In less than an hour, I had multiple responses to my first, "what is it tool" which I learned was a wire cable cutting tool.

I am continuing to organize my garage and I came across another tool that had either been in my Dad's or Granddad's tool box, that I have no clue on what it was designed to be used for.

The knob turns a straight, flat blade screw driver blade on the other end. The hole appears to be designed to fit a specific opening or fitting.

So, what do you think?

 

[Outlawmws]

Probably a valve adjustment tool. old Ford? I think they sued nut and straight blade...

The knob adjusts and the "wrench" locks.

 

[Erampu]

Outlawmws nailed the purpose, but I'm fairly certain it's for GM engines. I have one just like it for my '48 half ton pickup.

 

[Outlawmws]

Outlawmws nailed the purpose, but I'm fairly certain it's for GM engines. I have one just like it for my '48 half ton pickup.

Could be, I've slept a few times since I last adjusted valves on an old Ford in-line six...

 

[neophyte]

Alloy Artifacts.

"Zim Valve Adjusting Tool."

"In operation, the swinging arm is positioned over the desired wrench opening and then secured with the thumbscrew. The wrench then loosens the valve lock nut while the tappet is adjusted with the screwdriver, and the nut is tightened when the correct setting is reached.

http://home.comcast.net/~alloy-artifacts/other-makers-p3.html