american appearance Australian banknotes cash collectors color colored colors colour coloured colours currency decimal denominations dollars finance high-denominations lower-value monetary monetary-value money notes numismatics potential security success textures value values variations variety wealth banknote british dollar historic history king King-George-V low-value minimum pre-World-War-2 pre-WWII Singapore Straits-Settlements background bank banking business change circle coat coin coins copper economy emblem finances financial golden icon image income market metal object old one rich round sales sell shield shine sparkling symbol trade treasure vintage white yellow banknote-features changes features five-dollars introduced New plastic replacing superceding superseding arab isolated single polish zloty shilling