Kapkap - chief or queen's crown
The Kapkap is an intricately carved turtle shell disc totem surmounted on mother of pearl, and is equivalent to a crown. The Tsunono and Tehekao (in Haku or Teitahol in Halia language) wear it on the chest or forehead; a smaller one may be draped between the shoulder blades so the identity of the chiefly wearer cannot be mistaken from in front or behind. The intricacy of the filigree patterns and the Kapkap shell quality can be quite beautiful.
The central symbol may also be carved onto figurines and items of state, such as the Ti (garamut or large slit gong drum). My bubu (grandparent) Topu was a paramount Tehekao (queen of the Naboin) and had her Kap-kap incised into the skin on her forehead and the centre of her back. She was a beloved, grand and elegant lady.
Moses Matamana Havini

From left to right: Kapkap, Buka Island, acquired by the Australian Museum from G Sieman in 1885. Diameter 10cm. Kapkap (two connected), Aropa, South of Kieta, Bougainville Island, acquired by the Australian Museum in 1918 from WJ Potter. Back one diameter 9.5cm, front diameter 5cm. Photo: C Bento.