On the one in the coin case; It's difficult to say which decade of the 20th century this is from, as the same design has been used for quite a while (still is). These often had loop and were attached to a rosary, so it may have been rubbed a bunch during prayer, explaining the heavy wear.
Many similar examples; http://www.google.com/search?client...oM&q=vintage st anthony "in case of accident"
the small silver and blue enamel medal appears to depict st.michael slaying devil at his feet.while an abbreviated version it is very popular even today.raised sword is best clue.My best guess would be 1940s to 1960s by design only.these are my best guesses.