Hot Rods Beehive oil cooler I.D. ?

I have had this for a while and I believe it is a vintage oil cooler in a "beehive" shape...I would like more information about it as I can't find anything similar .....Just figured to be a custom hot rod item....cast aluminum material.....anyone know who made these and what era?

 

What's the purpose of the chrome cap? Looks like a vent to me, is this a catch-can of some sort?

 

I used this for a fuel tank on my vintage go kart....purchased it many moons ago at a Hot Rod swap meet.

 

I'd say reservoir of some kind rather than a cooler.

 

its a cool lil tank i thought it might be a hotrod power steering pump reservoir

 

Looks like a really cool vintage go-kart gas tank to me.

 

Looks more motor cycle oil tank oriented to me.

 

that's what I used it for

 

Too big for motorcycle, I have seen (and used) the smaller type for my motorcycles though.

 

Damn thats nice.