When I see pieces like this I am reminded of an old postcard that has been posted here a few times ; it's a picture of a Moro trader's shop most likely in Zamboanga . In that photo is a rack of brand new krisses and barungs many of them with junggayan hilts (ivory and wood) for sale to the general public .
So when someone refers to a piece like this as datu or royal I remember that postcard and wonder.