Hello guys, I guess I owe this following post and it is due. I've been exchanging some PMs with Detlef much earlier but here it goes.
This hilt is coming from a Cirebonese friend from whom I obtain some unique pieces, he said it is collected there and I have no doubt about his integrity.
I've seen few examples which is said coming from the area but unfortunately never as eleborate. Other than the shape which is attributed to Surakarta, the material, the build and artistic might give a good direction to Sunda, please refer to (easier to find) golok example from the region.
By mentioning Cirebon, I would suggest that we think of Sunda as a whole, i.e. Kuningan, Bandung, Ciamis, Sukabumi, Pandeglang, Serang, Cianjur, Sumedang, etc. and even the western approximate of Central Java.
I attached some old photos from KILTV online collection to show that by the late 1800s it seems that nunggak semi hilts is rather a standard for Sundanese aristocrates (most of the name confirm they are Sundanese ethnically i.e. not Javanese expatriate by Dutch appointment). If you browse more it is apperent that it is the same case with estern part of Java other than some people who prefer to carry local style on the occasion (East Java, Madura).
I could be wrong but I doubt nunggak semi is unique to Mataram in the past. To the more extreme way of thinking, can anyone prove that it is born over there? Then we learn that Islam teaching start from coastal regions (pesisiran) so could it be Banten? Cirebon? Tegal? Pekalongan? Demak? Jepara? Tuban? Gresik? When was it born? as early as 14 c.? 15c.? 16c.? older? much older? Has anybody worn it once in the street market of Trowulan of Gajah Mada time? Or only after Pajang era? Or is it imported (and/or modified) to Java from Sumatra (Pasai)? I doubt other than Syarif Hidayatullah (Sunan Gunung Jati) and people of his time who live long enough to witness the shift of Hindu to Islam (Majapahit to Mataram) can answer this.
If we brought it to modern time, it is now a 'standard' style, loosly and wrongly, nationwide. On the following pesisiran performace
[clip] , the attire, the dance, the music, everything says Sundanese, but not the keris. It has travelled as far as Brunei Darussalam on formal pose and become one of the most popular government souvenir for foreign guests other than Balinese keris.
Of course I can be wrong on this and I'm always eager to learn something new