I've got a few dozen french roll pans and two of them look just like yours, but they're unmarked. They must have been a hot item in Maine in their day, as we see them everywhere, generally unmarked. My two are quite heavy relative to the others and the cut-outs down the center are unique. Could you provide some dimensions of the pan, including the size of the cut-outs.
No info on the pan or the maker, but the company is listed in the foundry database. Doug, another photo candidate for the database?