appearance Australian cash color colored colors colour coloured colours currency decimal denominations dollars finance low-denominations monetary money not-in-circulation notes numismatics old outdated paper-money security success textures value variations variety wealth american banknotes collectors high-denominations lower-value monetary-value potential values banknote british dollar historic history king King-George-V low-value minimum pre-World-War-2 pre-WWII Singapore Straits-Settlements banknote-features changes features five-dollars introduced New plastic replacing superceding superseding