Australian twenty - dollar note - Wikipedia Australian twenty - dollar note Twenty Dollars ( Australia ) Value 20 Australian dollars Width 144 mm Height 65 mm Security features Window, Watermark Paper type Polymer Years of printing 1994 -- 1998, 2002 -- 2003, 2005 -- 2008, 2010, 2013 Obverse Design Mary Reibey Designer Garry Emery Design date 31 October 1994 Reverse Design John Flynn Designer Garry Emery Design date 31 October 1994 The Australian twenty - dollar banknote was issued when the currency was changed from the Australian pound to the Australian dollar on 14 February 1966. It replaced the £ 10 note which had similar orange colouration. There have been only two different issues of this denomination : a paper note which had a gradient of yellow and red, with a distinct orange background, and a polymer note which can be recognised for its distinct red - orange colouration. The polymer note was issued on 31 October 1994. As of June 2016, 160 million $20 banknotes were in circulation, 11 % of the total notes in circulation ; worth $3,196 million, or 5 % of the total value for all denominations. Since the start of issuance there have been 14 signature combinations, of which the 1967 issue is of the greatest value, issued for one year only ; and the 1989 Phillip / Fraser being issued for less than a year. From 1966 to 1974 the main title identifying the country was Commonwealth of Australia, there were 146,960,000 notes issued in its life. This was subsequently changed to Australia until the end of the issuance of paper currency for this denomination in 1994 with 1,661,970,048 of these notes being issued. Design Obverse with Charles Kingsford Smith. Reverse with Lawrence Hargrave. The people depicted on the paper note issue were Sir Charles Kingsford Smith on the obverse along with five Lissajous curves drawn by a two - pendulum harmonograph, and Lawrence Hargrave on the reverse with his drawings of kites and type aircraft designs. The polymer note features Mary Reibey on the obverse with an early colonial building and sailing ship including her signature. John Flynn is on the reverse with features of the Royal Flying Doctor Service of Australia of a De Havilland DH. 50 biplane Victory supplied by Qantas, medical instruments, Coledge Harland ( the man on the camel ), who was a missionary to the inland people of Australia. His signature is included. A compass is in the clear window with the raised 20 lettering. These famous people are depicted against a definite red background. The note was designed by Garry Emery. Colouration is said to be either red or orange but has been debated many times over the years. Official documentation states that the colour of the twenty dollar note is predominantly orange. This polymer note is colloquially known as a `` lobster '', due to its red colour. Security features The paper design included a watermark in the white field of Captain James Cook, the watermark was also used in the last issue of pound banknotes. A metallic strip, first near the centre of the note, then from 1976 moved to the left side on the obverse of the note. Polymer issue includes a watermark or clear imprint of the coat of arms which is printed over. Embossing or a raised image in the clear panel of the number 20. Also for this issue fluorescent colouring was added to the serial numbers, and a patch that shows the banknote 's value. A star with four points on the obverse and three on the reverse which join under light. Raised print and micro printing of the denomination name are included. References ^ Jump up to : `` The Reserve Bank and Reform of the Currency : 1960 -- 1988, Australia 's first decimal banknotes ''. Reserve Bank of Australia Museum. Reserve Bank of Australia. Retrieved 31 December 2015. Jump up ^ `` $20 BANKNOTE ''. Banknotes in Circulation. Reserve Bank of Australia. Retrieved 9 February 2015. Jump up ^ `` DISTRIBUTION - CIRCULATION AND PRODUCTION STATISTICS, AS AT END JUNE 2016 ''. banknotes.rba.gov.au. Reserve Bank of Australia. June 2016. Retrieved 18 January 2017. ^ Jump up to : `` THE $20 BANKNOTE ( interactive ) ''. Banknote Features. Reserve Bank of Australia. Retrieved 9 February 2015. Jump up ^ `` List of Security Features ''. Counterfeit Detection. Reserve Bank of Australia. Retrieved 9 February 2015. Ian W. Pitt, ed. ( 2000 ). Renniks Australian Coin and Banknote Values ( 19th ed. ). Chippendale, N.S.W. : Renniks Publications. pp. 171 -- 172. ISBN 0 - 9585574 - 4 - 6. 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Question: who's on the 20 dollar note australia
Answer: Mary Reibey