Gaddang tribe style hat, with Buri palm, beads, knit cloth

This highly decorative hat was purchased in the 1990s, from an antique gallery in Manila. It comes with a tag that states it is from the Gaddang tribe, made of buri palm, rattan and beads. The Gaddang people live in North Luzon, the Philippines, and their costumes display exquisite beadworks. We were not able to find any information relating the hat to the Gaddang people, whether the item is part of their culture or made solely for trade. We found commercial knit cloth on the hat, an indication of communication with the outside world.
In the early 17th century, the arrival of the Spanish missionary to the Philippines created the distinction between the "Christianized" and "non-Christian" Gaddang. The successive influence through American occupation and Japanese occupation all has its impacts on the culture of the Gaddang people.