This is a solid silver coin minted between 1387 -1427  during the reign of Vlad II.  No silver coins were made during the reign of Vlad III (Dracula).  This coin was minted by members of the Oder of the Dragon.
 
The coin has been placed in a Sterling Silver bat pendant.  The pendant has been accented with 18 karat yellow gold.  The pendant is approximately 1 inch by 1 inch.