prize-winning ticket; winning lottery ticket
「落札」 has another reading with different meanings.
落札を手にして喜んだ。
I was delighted to get the winning ticket.
祭りの抽選で三等の落札が出た。
A third-prize winning ticket came up in the festival raffle.
落札の景品は見事な陶器のセットだった。
The prize for the winning ticket was a splendid pottery set.