Hello Chandra,
thank you very much for your detailed post and the very interesting pictures.
I will describe my hilt as a Cirebon yudowinatan hilt.
What catch my eyes are the collection from Raden Adipati Wira. The keris he wear in the first picture and is shown at the second picture in the middle again. The wrongko is typical Cirebon/Tegal but the handle is normally attributed to Sumatra/Kariman Djawa. Also the wrongko at the fourth picture on the left side is in the form of Palembang sheaths but it is not the first time that I have heard that this for is also common for Cirebon. This all shows again that the affinity between Java/Cirebon and Sumatra is very very close.
Thank you again and kind regards,
Detlef