It is hard to be certain, but it could be just Y. akbar which often have no HW spot.

https://wingscales.com/Nymphalidae/Y...ar-Talbot,1947
https://2.bp.blogspot.com/-CGFlgP23_...%2Bgallery.jpg
https://www.thaibutterflies.com/Butt...8%AA%E0%B8%B2/
http://macromia.blog.fc2.com/img/Ypthima.jpg/

TL Seow: Cheers.