This is the same as previously ID'ed as A. selta.
https://thaibutterflies.com/Butterflies/arhopala-selta/
http://www.samuibutterflies.com/inse...alaseltaselta/
http://yutaka.it-n.jp/lyc4/82110001.html

It may simply be a dwarf example.

TL Seow: Cheers.