Вот, нашел. Как говорится, официально, из первых уст:
Speech by Mr L Wilson Kamit, CBE, Governor and Chairman of the Board of the Bank of Papua New Guinea, on the release of the new series K20 banknote, Port Moresby, 8 November 2007.
...In 2005, The Bank of Papua New Guinea undertook a review and modification of the design and upgrade the security features while retaining the traditional flavour of the original banknote designs. In re-designing our currency, we re-emphasized Nation building and Nationhood and hence the family of banknotes depicting the national crest which is the stylized bird of paradise sitting on a kundu drum and the ceremonial spear and the National Parliament which already appears on the front of the K2, K10, K50 and K100. The designs on the back of the notes remain unchanged.
Вот ссылка на источник:
[Прихований текст]