Moro Barong With Real(???) Chinese Influence: A Tortoise Shell Ferrule

[Dimasalang]

Very nice!
But weren't tortoiseshells on Moro weapons done later by the mid-20th century?(Specifically the scabbards). I don't think I have ever seen any tortoiseshell used on Spanish era and early 1900 Moro pieces. But that does look like a very early piece. Just my limited observation and opinion.