The medallion tells all.
On the obverse is the Virgin Mary. On the reverse side on either side of the chalice are the letters "S" and "I". They are the initials in Latin (Societus Iesu) Society of Jesus (Jesuits).
What I can't wait for is when they start uncovering the religious wealth. If any of it can be ascribed to the Jesuits, we may see markings that will explain a lot. And then again, maybe not since the Atocha went down in 1622 and most of what we think the Jesuits secretly did started in the 1730s. But then again................who knows? HAHAHA