The coronation night : 23 September 2017 at Ultra Arena Show DC in Bangkok
The winner will get diamond crown, sash, honor trophy and cash 1,000,000 Thai Baht (USD 29,500). She will represent Thailand in the up coming Miss All Nations.
IG @missallnationsthailand
https://www.facebook.com/missallnationsthailand/
Here is official 27 finalists.
source: http://www.siamdara.com/hot-news/thai-news/1104513