While coin collecting, or numismatics, is the more common specialism of anyone with a penchant for currency, banknotes have their own equally dedicated, if not quite so wide, following.
The first banknotes made their appearance in China as far back as the seventh century. Although Marco Polo returned from his travels with some examples in the thirteenth century, the concept would not be widely adopted in Europe for a further four hundred years.
Just as with stamps, the variety is so great that the budding collector is best advised to find a theme in which they have a natural interest. Perhaps you have a penchant for animals, portraits or the banknotes of a particular country. More specialised still are the notaphiles on the lookout for certain serial numbers or notes featuring signatures.
As might be imagined, factors affecting the value of a note include its overall condition and, above all of course, its rarity. A case in point is the world’s most valuable banknote: the US 1890 Grand Watermelon $1,000 Bill. Only seven are known to exist in the world – and only three of them will ever be held in private hands. It is known as the Grand Watermelon because of the plump zeros on the reverse. Forget face value though. The last time one came up for auction in 2014, it went for a cool $3.3 million.