I think you are right here.
So far in India this feature is consistent.
It would appear that the silvery veins are evident only when the butterfly is still alive.
https://www.ifoundbutterflies.org/me...ccd146d3-1.jpg
https://www.ifoundbutterflies.org/me...ccd146d3-2.jpg
https://www.ifoundbutterflies.org/me...ed04bfcc-2.jpg
https://www.ifoundbutterflies.org/me...ed04bfcc-1.jpg
TL Seow: Cheers.
PS. As for post 125 it should still be C. strabo.
Similar to this male.
https://www.learnaboutbutterflies.co...s%20strabo.htm
PS 2. Australia have only species, C. panormus. (+ a totally different C. amasea.)
This is C. panormus in Australia.
https://dl.id.au/1/g.php?c=4&i=162
http://lepidoptera.butterflyhouse.co.../panormus.html