What besides rust would cause this coloration. The coin seems like a normal penny underneath and not coarse like rust, though I am guessing it still is just that. Still, Some cool cracks underneath on the obverse side. P.S. To those who helped me get better pictures in the past. Thank you. I have been working on it. Cheers!
1943 cents are steel, not a copper based cent, so they do rust. The zinc coating wears away, and rust can form on the coin.
Yes... probably from a lot of O2 and moisture, and a good helping of transverse magneto energy surging through it. Though, I can't really remember...