History Art deco engine analyzer

Just got this thought it was cool it's a combustion ****yzer any info would be helpful thanks

 

That’s cool as hell right there.


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Should I rush your rush job or the rush job I was rushing when you rushed in?

 

I’ve never heard of something like that, early smog machine? Any hoses to hook up or wires, etc?

 

I wish I knew more about it there was a post on this site some years ago this one didn't have the cabinet