Here for your consideration is a very rare Mint UNC Very Last Prefix ADK Australian Paper $20 banknote. Derived from the very last batch printed.
The note offered here is even rarer as it includes a Limited Edition No.2347 of of less than 4,000 Printed in Black OvPT. It celebrates the 100th Anniversary 1893-1993 of Hargraves famous box kite experiment, an innovations in Aviation at Stanwell Park South of Sydney in 1893. Nicely exhalting the aviation theme of the old $20 Australian paper banknote it has Sir Charles Kingsford Smith, the early Australian aviator on the reverse of this very last side-thread & OCRB machine readable serial font type $20 banknote.
The change from center to side thread on later paper issues was done to increase the longevity of paper notes during circulation, with the later font change from Gothic to OCRB incorporated due to advent of machine note count readers from 1979 onwards. This very last batch of $20 paper issue notes replaced by polymer issues from then onwards.
A great time to invest in this note as it will only increase in value steadily.
Obverse: Sir Charles Edward Kingsford Smith MC, AFC (9 February 1897 – 8 November 1935), often called Charles Kingsford Smith, or by his nickname Smithy, was a well-known early Australian aviator. In 1928, he made the first trans-Pacific flight from the United States to Australia. He also made the first non-stop crossing of the Australian mainland, the first flights between Australia and New Zealand, and the first eastward Pacific crossing from Australia to the United States. He also made a flight from Australia to London, and set a new record of 10.5 days.
Reverse: Lawrence Hargrave (29 January 1850 – 14 July 1915) was an engineer, explorer, astronomer, inventor and aeronautical pioneer.Hargrave had been interested in experiments of all kinds from an early age, particularly those to do with flying machines. When his father died in 1885, and Hargrave came into his inheritance, he resigned from the observatory to concentrate on full-time research. and for a time gave particular attention to the flight of birds. He chose to live and experiment with his flying machines in Stanwell Park, a place which offers excellent wind and hang conditions and nowadays is the most famous hang gliding and paragliding place in Australia. In his career, Hargrave invented many devices, but never applied for a patent on any of them: he did not need the money, and he was a passionate believer in scientific communication as a key to furthering progress
Watermark: Captain Cook in left panel
The box kite was invented in 1893 by Lawrence Hargrave, an Englishman who emigrated to Australia, as part of his attempt to develop a manned flying machine. Hargrave linked several of his box kites (Hargrave cells) together, creating sufficient lift for him to fly some 16 ft (4.9 m) off the ground. A winged variant of this kite is known as the Cody kite following its development by Samuel Cody as a platform for military observation during the Second Boer War. Military uses also involved a kite/radio transmitter combination issued to pilots during World War II for use in life rafts.
A box kite is a high performance kite, noted for developing relatively high lift; it is a type within the family of cellular kites. The typical design has four parallel struts. The box is made rigid with diagonal crossed struts. There are two sails, or ribbons, whose width is about a quarter of the length of the box. The ribbons wrap around the ends of the box, leaving the ends and middle of the kite open. In flight, one strut is the bottom, and the bridle is tied between the top and bottom of this strut. The dihedrals of the sails help stability.
Large box kites are constructed as cellular kites. Rather than one box, there are many, each with its own set of sails.
Most of the altitude records for kite flying are held by large box kites, with Dacron sails, flown with Spectra cable. Before Dacron, Spectra and Kevlar were available, high performance box kites used oiled silk, linen or hemp sails, and were flown with steel cable. Silk, linen and hemp were used because they could be spun finer than cotton and stretched relatively little when wet. Steel had the highest available strength for its weight.
*All biographical details are taken from Wikipedia for education purposes only