The museum was closed for many years. Now is restored and open but not all the pieces are exposed. In the 1970 there were 14 rooms, now surely lesser (i visit the museum last year).
I send two images of an old italian book I have.
Paolo

You cannot expect to find experienced personnel in all museums.
In the "Indonesian Room" there is an inscription with few lines trying to explain what the keris is. Unfortunately in three lines there are four big mistakes !
Among the Japanese swords (many have been sent to Japan for restoring and polishing) there was one with an evident fingerprint on the blade. A nightmare for sword lovers !
Few people is interested in ancient weapons. The director, Mrs Fiorella Spadavecchia (Spadaveccia means "Old sword") does not honor her name: she is apparently more interested in shadow puppets (she wrote a book on wayang kulit)
If you wish to take photographs in the museum, you may ask for the permission to Mrs. Spadavecchia. Her office is far from the museum, in S. Marco square, right side facing the church.

wow, that's a beautiful twisty core..

Yes ,really beautiful, but when I visit the Museum I didn't find the keris of the photo !!!!
Paolo