Assistance for a keris novice

[A. G. Maisey]

How do you reckon this blade might have looked before it was carved with a naga, Shayde?

Whether it was carved from an old Tuban, or some other old, beefy blade, or whether it was forged with the intent of carving it with a naga, it is absolutely certain that the cross section was way different to what you can see now.