A medallion from the Theresienstadt Ghetto

This medallion was made in the Theresienstadt ghetto by the doctor Karel Schleissner for the girl Rita Bejkovska. Look at the medallion. What is engraved on it?

Click the magnifying glass to see the engraving clearly.

What does the necklace resemble? Hint: click here.

Look and think:

Why did the doctor, who befriendedRita, choose to give her this particular design for the necklace?

A medallion necklace, crafted by the doctor Karel Schleissner.