I have the Soundtrack, and most of them sound alike. Whichever I play could be considered the theme. Check out "The End", "The party on the Wisla" and "Don Karol" all by Preisner
share... not quite your answer ...
The "comb theme" is the chorus to "To ostatnia niedziela" (This Last Sunday) music by Jerzy Petersburski, (unsung words by Z. Friedwald) made famous and still available in recordings by Mieczyslaw Fogg. The chorus translates roughly
This last Sunday, today we part
We part today for ever.
This last Sunday, I don't regret,
look at me lovingly on last time.
You will have enough other Sundays,
But what with me, who knows what.
This last Sundy my cherished dream,
The luck so desired is ended.