Returning to the thread and the question which is what were the better quality Katars? I presume the daggers worn at court fall into the same category.. Pinterest has a lot of very ornate examples at:
I picked out a couple to place here...The older example with a full handguard form being 17thC and the other showing both sides 18thC. It would seem reasonable to inspect Mughal Court paintings of the period for examples of artwork displaying Katar being worn however these are miniatures and fine detail is not easy to see...
As already stated surely koftgari and finely made scabbards and those examples with semi precious stones incorporated into the design would be likely suspects as court swords or as better quality Katar?