https://www.twitch.tv/videos/1665246101
At 02:55:33 in the clip they ding
There is a clock visible in the stream so its 2hours 25mins after launch
Dont know if this is legit because none of them seem to "celebrate" but looks like it
Big Congrats if its legit, very cool to see korea take place in this game
Edit:
Extremely Worthy mention:
Gingis group apparently did 60-70 in 1hours 30min but they werent able to start playing until after 1hour and 30min
https://www.twitch.tv/videos/1665205831
Starts at 02:46, ding 70 at 04:16