Doug,
In the description he says "It has an open frame and 12 rectangular cups.
Each cup measures 2 1/2 x 1 7/8 x 3/4"." and "Jon Haussler lists this pan in his Muffin Pan Book as variation # 3 with a value of $700-900."
So my guess would be some sort of muffin or bread product.
If you are looking for more detailed explanation than that you'll need more of an expert than me.
