This is a fine Collingwood Bay, Oro Province, Papua New Guinea, boar’s tusk mouth ornament known as a “kamba” as recorded by Dr. Fred Gerrits when one of his staff collected this in Beuru village in March of 1968. This example is an especially fine one with its rows of nested boar’s tusks overlaid with conus shell rings inset with red seeds and bordered with strings of tiny multicolored beads. If you look closely at the image of the backside you can see the cordage-wrapped bite stick where the man grasped this between his teeth. The piece is 6 ½” (16.5 cm) in height, dates to the early 20th century and sells for $2000. Questions?