This is an absolutely fascinating example! and would seem of course perhaps to be 'one off' but for Battara's example posted (Thank you Jose!). This suggests that there must have been a certain convention for shields/bucklers with these curious added features.
Notable (and seen on both examples) is the hook, which rather than being a potential 'weapon' such as the spike and knife, would be perhaps thought of to snag or grab something, i.e. a weapon? This notion , while often suggested toward weapons features for such purposes, has not as far as I know, has not been proven viably.
Indian arms makers have it seems always been innovative, and the creation of combination arms has long been notably in place, it seems often to impress more often than to be effective in actual combat. Obviously not to say these features could not have been effective, however, in most cases, likely arms of this character were more for visual effect in certain events in the manner of gatherings of court notables etc. The British 'Imperial durbars' were the formal examples of these kinds of gatherings (1877, 1903 and 1911) and these brought the armorers of various regions to show their wares and these kinds of examples among others brought notable attention.
I think of the curious warrior of India looking quite terrifying with huge sword and adorned with spiked armor (uncertain where the image posted is from but seemed interesting as example).
My interest in this shield is very piqued! and I hope there will be more discussion......I am anxious to get to my books!
Thank you again Osca! .........hope we can pursue further!