Mandau from Hornbill and Dragon exhibition

[Green]

This mandau was auctioned on 12 January. It was described as a 19th century mandau exhibited in "Hornbill and Dragon" exhibition in 1991 in a museum in USA. I can not recall the detail as the full description is now not available after the auction from the auction site. I do not have Bernard Sellato's Hornbill and Dragon book , so can anyone that has this book inform if this exhibition is related to the book and is this mandau included in the book?

Also, any information or comments with regards to type, tribe and form of decoration on the blade etc is much appreciated .

Thanks

Nik/Green