Originally thought this bottom cart was a match to the Huot top box but then realized it's not. I still love it. I had an old sun cart with similar slots for a piece of equipment in the top.

It's got matching red plastic torpedo type handles if that helps.

Any ideas on maker, era etc?

The rolling box looks like a base for a Sun diagnostic machine to me. 1950s-60s

Cool stuff!! I collect items like this and can't say I've seen this exact cabinet. I have a ton of Sun stuff and it doesn't match any of that.... I would guess some other brand of diagnostic equipment based on the odd holes in the top? Neat cabinet - if it's for sale - please message me?

What are some other brands I might look into to see if I can find a match?

Check out Ammco brake lathe , they used that color and it's the right size.

I wasn't able to find any ammco cabinets like this either. Still stumped.

Also, what piece of equipment might have been on it that it has drainage (?) Holes on the bottom?

your cabinet looks similar to this OTC "Owatanna Tool Co." tool chest I have.

RM

Valve grinder