All three should be D. penicilligera.
The orange crown is small & there are two series of diffuse whitish spots on the HW.
The white band is typically narrow in this species.
https://www.ifoundbutterflies.org/#!...-penicilligera


D. vidura & sinhara are much confused.
D. sinhara is mainly Sundanian extending to S. Thailand.

The difference between the two are based on C&P4 (Butterflies of the Malay Peninsula).

D. vidura :Orange crown not obliterating the postdiscal line.
https://en.wikipedia.org/wiki/Dacala...daMUpUnAC1.jpg

D. sinhara; Orange crown obliterating the postdiscal line.
https://www.jamiun.com/dacalana-sinhara-sinhara/


TL Seow: Cheers.