Hi Rasdan it is pamor , you can see the pattern on the inside of the pendok also . I was told that this was made in the traditonal way then beaten by hand at working heat into a thin sheet (there are no rolling mills in Maduran villages) . The flat sheet is then cut into a fan-like shape and hot formed over a sangklon ( a pendok mandrel ) The real skill comes in the welding of the finished product .
All in all a very labor intensive project .