WoWS: Bonus code for free Tokyo Game Show Flag (ASIA)

https://worldofwarships.asia/dcont/fb/image/e3b14846-9c1f-11e7-a27b-38eaa7374f3c.png

FLAGTGSB2017

NOTE: Bonus Codes are only available while supplies last. Bonus Codes will be available until 30th September 2017 @ 23:59 UTC+8.

Tried it on EU, does not work.