Oh, I didn't bid on that hilt. I just collected the pictures for reference. Costs too much to buy every interesting keris...
Yes, the hilt you posted is the one. See the posture, hand signs, the crown, the makara by the side of his head, and even the anklets that are very often seen on tajong hilts. It has all the essential features of a proto-coteng/tajong, and a long nose to boot.