Yes, he is of Jewish origin. That is a big help.
Hint: why should a countenance of a Jewish man be displayed in/at a Polish ...... ? Where, exactly?
It looks like the head of a drawing pin.
Aaah, the drawing pin? Do you think it is an alien addition to the whole item? No, it is its integral part.
Hint: the colour of the "pin" suggests its real nature. What exactly is it?