The reverse doesn't show the same affect. I would think that Heat on the Steel cent would have changed the color a bit. Possible older sanding on the obverse on the 1943? That would leave marks the same on the tops of the devices and on the fields. The 1943 cents had a coating of zinc on them, so if they were careful, it might affect just the coating on the cent. Reverse not altered.
1947-S looks like it was heated with a torch.
Edited by coop
11/22/2016 7:07 pm