My World Wednesday: What is it?

Years ago my husband helped to clean out his aunt's house after she and her husband passed away. He found these unusual pans and brought them home to me. I have no idea what they are or how she used them.

The pans are really thick and heavy cast aluminum, meant to hold the heat. Because of their shape, I believe they must have been meant for the oven. I've used the pans like muffin tins and one Christmas made cute coconut snowballs with them.

Aunt Ester was a very frugal woman and I don't believe she would have pans that only made snowballs. Her name is on a tag on the back of the pans in the way one does when taking the pans away from home. Where would she have taken these pans and why, I've wondered.

Can anyone help me solve this mystery?