When I bought 3 large PRR wrenches about a year ago this guy gave me this extra part to me free and said it belong with the wrenches. Even though I didn't want it. The paint matches perfectly with the wrenches. Said he bought from a estate and didn't want to separate it.
I have no idea what it is. Maybe part from a train?
I've seen that here or on Garage Gazette before, but don't remember what it is.
Looks like a compounding funnel you find in a boiler room.
Generally it's found atop the tank that adds chemical to the makeup water.
That one was probably reassigned to another job.
A drip catcher under the spout on a luber in a gas station or a very old funnel from an oil change barrel?