When a tangguh is nominated for something, it is very often an opinion, sometimes just about everybody will agree with the opinion, other times nobody except the person who gave the tangguh will ever have heard of it.
Some people interpret tangguh as "style", other people interpret it as "period", or "era".
I feel that possibly the organisers of this exhibition were wise to avoid offering information on tangguh. At other exhibitions I have seen very recent keris identified as "Mataram" and Majapahit" & etc.
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