Unless there are other species of 6line blues in Borneo, I am quite confident it is
N. normani.
Wingshapes are easily distorted in photos & I have learned not to rely on them too much.
You cna pretty much discount
N. berenice , calauria & kurava .These have define black striae in the bands.
That leaves
N. beroe & normani. The dark striae here are poor as can be seen in the set specimens & a field shot.
Note the wingshape is also distorted.
The large dark submarginal spots match very well.
The ssp of
N beroe appeared to be the same in Sumatra, Malaya & Borneo.
N. beroe is not rare & there are good examples. The submarginal spots are different & the wingbase usually darkened.
http://2.bp.blogspot.com/-2iA9V4YMtR...0/DSC_0245.JPG
http://1.bp.blogspot.com/-HvpFxJKK7J...0/DSC_0096.JPG
The aberration judging by its large dark submarginal spots is also N. normani.
TL Seow: Cheers.