Picked up a few pieces on Saturday, A nice little number 3 skillet with a diamond with a number 3 in it and a small spider (5") with D.O.-52 on the bottom, I am guessing the number 3 skillet is a Chicago Hardware Foundry although it is not hammer finished and has a very unique bottom, instead of a heat ring the bottom is actually recessed , The little spider which measures 5" across the opening and is 2" deep is marked D.O.-52 on the bottom, My guess is that it is a childs toy but that is only a guess