Magazine cover: Numismatics

A journal devoted to the study of currency is seeking an image for the cover of its quarterly publication. The image must clearly show money, in any of its popular forms. The ideal image would be a close-up, but other images are acceptable so long as it evokes the topic for the reader. Any form of currency is acceptable so long as it is primarily known as currency and not as something else (bartered items, such as seashells and furs, are not acceptable). Machine tokens are also unacceptable.