Hello,
You have to differentiate between the short sword KRIS sundang from the Philippines, and the KERIS dagger from the Indonesian archipelago. Your first piece is a KRIS. Your other 4 are KERIS. The Balinese one actually doesn't looka that old.
The KRIS sword blades should not take a set, while the KERIS daggers might, as they're lower carbon-content and softer.
Emanuel
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