The "three pointed" oil lamp? Real or fantasy?

[Titus Petronicus Graccus]

Thanks for the info Paul!
Do you know if they were all brass or were some of them stoneware/terracotta?
The reason I ask is that I have a potter who works in a studio upstairs from our store that is willing to do whatever and he's not above sticking to historical specs.
Pics would be much appreciated!
Vale,