2nd & 7th Saturn Pentacles for Protection, Spirit Control.
Solomon Amulet - Descriptions from the Key of Solomon...
One side (top) is the 7th Pentacle of Saturn and used 'for exciting earthquakes, seeing that the power of each order of Angels herein invoked is sufficient to make the whole Universe tremble.
Bottom image is the 2nd Pentacle of Saturn and 'is of great value against adversities (Protection and Success); and of especial use in repressing the pride of the Spirits.' It contains the infamous 'Sator' magic square.
Made of solid, heavy pewter and comes with cord necklace - approximately 1 1/4" in diameter.