Here is a man who has never taken apart a tulwar, I think
They usually make the hilt in two hollow-backed shells, welded together, usually by a copper based solder (brazed), each half/shell is cross-shaped, and the arms, as well as the long leg are hollow (the "head" if you will, is flatter, thinner and forms the lagnets. The "leg" becomes the handle, and is also joined to the disc pommel, which may be made of as many as 4 or 5 pieces itself; the hollow remains hollow, to be filled with the pitch adhesive that holds the tang. Each hollow "arm" on the welded/soldered/brazed-up finished hilt is filled with basically a huge round nail. The nail-head (as it were) becomes the swelled tip of the quillon, while the nail itself (and mind you it isn't really a nail, but a purpose-made piece) fills the hollow quillons for part or all of their length. That is the usual tulwar hilt, and yeah, you're right; this ain't quite it that we're seeing here; it's certainly a variation, I'd say. The Turkish cross-shaped hilt may be structured differently, as well as Persian, kaskara ones, Swahili/Arab ones I've seen were split out of a single block, but with a small opening, requiring a seperate ferule. Oops; my shower's gonna run cold!