Hi Montino!
Do you mean the kard on the far left, the one with the quartz handle? For me the hollow grind isn't really apparent on this one, as it was on the one you showed. Bear in mind though, that I have minimal experience with these kind of knives, so I probably don't know what to look for.
I do notice however, that the kard second from the right - the one with a jade ram's head hilt - seems to be made from pattern welded/folded steel and not the typical fine crucible watering/wootz, like I believe Indo-Persian kards often display. Is a folded pattern uncommon in Mughal daggers or have I just not seen enough of them?
Beautiful and to die for, all of 'em - that's for sure! *droolysmiley*
Take care, - Thor