According to Jensen's krisdisk this hit could be very old (probably before majapahit)
Originally it musted be completely covered by a thin metal (mas muda according to some indonesian friends) leaf. Now there is only a little bit over garuda munkir.
IMO the quality of work is very very nice
.
Strange is material: if i sting it with a burning pin: no smell and only very little smoke! It is probabily a hard mix between something like earth and something like sirlack (resin)... so ,if i am right
, all the work that is on the hit is only a track of the work over the metal.
How can the maker did this work without make any problem to the hit's core?