The Australia 100 Dollars Banknote was issued by the Reserve Bank of Australia in 2010, printed on polymer. It has a color combination of green, orange, and yellow. The obverse depicts the interior of Her Majesty's Theatre in Sydney, a portrait of soprano Nellie Melba, Melba's signature, the monogram from the 1902 Melba Australian Concert Tour program, and a lyrebird. The reverse features World War I soldiers on horseback. It also shows a lyrebird, a Rising Sun badge, a portrait of commander John Monash, and batteries of the 2nd Australian Division attacking the Hindenburg Line, from the 1917 photograph Artillery in Noreuil Valley. The banknote does not contain a security thread but bears a watermark revealing a shadow image of the Australian coat of arms. It is 158 x 65 mm in size and is signed by Glenn Robert Stevens and Kenneth Henry. This polymer banknote is in uncirculated condition.