looks like a galerius from antioch left (roman coin) and a phocas follis of cyzicus on the right (byzantine)...phocas probably has bronze disease ...greens spots! scrape with a toothpick/fingernial and make sure none of that green stuff comes off as a powdery like substance.
Not sure what your question is. If the one coin had BD, it needs to be treated before it eats away at the entire coin.
If you want to turn them into money, you won't get much. The Galerius is worth maybe $2 and the Phocas more, if it can be cleaned of green spots without damage, but if you took them to a dealer the offer might be $5 or it might be "I don't want them."
