Since the Greeks of Asia Minor invented coined money in the late seventh century BC, the emphasis throughout history has been to focus on minting higher value pieces, with the production of small denomination coins used by 'the poorer sorts' often being neglected. Imagine trying to buy an 80p loaf of bread in the corner shop if our currency consisted only of 20 notes. Many people the world over in times past did not have to imagine - this was a conundrum...