[Jim McDougall]

To reiterate more on the case for the classification of tulwars attempting to establish regional characteristics, much of which was popularized by Dr. G.Pant in "Indian Arms & Armor" (1980):
The impression is that the hilt forms reflect locally favored types which he names and illustrates, however, as can be seen by a map of the huge state of Rajasthan. most of these terms come from places in the geographic boundaries of that state.

The silver inlay which appears to remain on this hilt suggests a style of inlay which was created in the Bidri regions of Rajasthan. The style was widely copied and diffused to the point some arms were classified 'Bidri'.

The term 'katti' is a term for knife (if I recall) in the Kanada language used iin western India by Coorg's.
The term 'Sirohi' is often regarding the highly favored blades from this region for quality, but cannot be defined by any particular characteristic I know of.

Other terms like Mewari, Udapuri (actually same region) reflect an industrial center in Rajasthan where considerable production of hilts and swords took place.

To classify tulwars by ethicity or cultural denominators is equally difficult as Rajputs, Sikhs, Jains and Mughals all used them without particular favor to any one of these hilt styles. Blades were constantly traded, and diffused throughout sword hilting centers and arsenals.

Bikaner (in Rajasthan) is one of the few arsenals whose markings are well established on blades (stippled letters or numbers), and where huge volume of Indian arms have been found.

Tulwars were used of course in Sind to the north,northeast, in Punjab (traditional domain of the Sikhs)north, and in Lucknow, Delhi and other key locations of the Mughal empire to north, northeast.
The Rajputs were primarily situated in Rajasthan.

So decoration and certain motif and styling along with certain hilt elements can be used in some degree with tulwar identification, much as these are considered in degree for period, remembering that these hilts typically may have been produced somewhere in the vast Rajasthan region.

Naturally these are simply my own overviews from my own experience in the study of these, and I am certain there are likely different views as well as probably errors, so I welcome any input concerning my comments.