Dear Sir:
You have indeed seen a demon. I think the coin is a
Muntoni Number 195, described as "S. Michele scaccia Lucifero." So your
coin shows the Archangel and the greatest demon of them all. The coin is a quattrino.
Urban
VIII issues much better demons. On the huge silver "piastra" you will get a much better look at "Lucifero" and "Sancto Michele," too.
Muntoni No. 34, another piastra -- which is about 20 percent heavier than a U.S. silver dolar -- shows our hero besting no less than four demons.
Follibus Fanaticus