Pak Ganjawulung
Thank you for your expertise. “Nangguh” keris or to estimate where and when the keris had made is a one aspect on keris culture placed on the top rank on the keris knowledge. And I’m sure that you knew about that. Indeed that the Tangguh of keris can be analysis from many aspects. And I thought the men who has good experiences about the keris culture know well about this. Especialy men who live and interaction in the culture where the keris had made and used. To analys the keris we cannot leave the cultures, because the keris not just a thing or object. The keris is a cultural pieces too.
And was right that some aspect to analysis the tangguh can be seen on the blade style. Like luk style, panetes, greneng, gonjo, kembang kacang, wadidhang, tikel alis, trep-trepan pamor (pamor and iron blended), etc... Tantingan and tingtingan usually can be used if we're not too sure about the era (period), like the keris which made on Segaluh (Tangguh Segaluh) and keris Segaluh which made on Mataram period (Tangguh Segaluh Yasan Mataram). So, the people who has good experiences and intently to learn the keris culture (not just at keris market of course), had seen too many keris style and always well touching with the keris everyday can guessing the keris by seeing the form of the keris and ricikans without handed the keris by them self. So, from the pictures we also can guessing (nangguh) the keris, especially to know by our self. And I think this topic ever discuss on other thread.
As the cultural object and talisman, the keris gave many deep meaning like philosophy, histories and honour of cultural aspect. So, everything on the keris, especially Tangguh, not just trifling. That just my humble opinion, Pak Ganja
And regaring my keris which has luk rengkol, this can be a Daleman Sumenep keris which estimated about 18th century. So, as your expertice, this keris has ricikans as Sumenep Maduranese keris. And it shown to me that not just a Pengging keris which has luk rengkol. Some keris from Mataram Sultan Agung priode also has deep luk like the Pengging keris.
So, thanks a lot for your expertise