From a local estate, here is a lot of (2) of the old drop-in burner for an oil lamp. These are both brass with a 5" base, about 3" from bottom to lip. Both have a wick mechanism and tank cap. These are generic, one unmarked and one USA. One has an old wick and flame spreader, the other does not.

These both show general age and patina, old dust and grime, etc. Wick mechanisms work on both. Tanks look fine, no holes that I can see, but I have not filled them to be sure.

Selling as found at local estates and collections. Great for display or to electrify.

Please check out all of the photos above. Thanks for looking!