I love coins on the extremes of numismatics, but I am beginning to develop a deep appreciation for the skill of the early classical Greek celatores working on these absolutely miniscule AR fractions. Troas, Kebren AR Hemitetartemorion (5mm, 0.09g... no really!) Early/mid 5th century BC? Obv: Head of ram right Rev: Male head (apollo) right Not the best-centered coin, but the portrait is exceptionally well done, almost three dimensional even! And since it's hard to get an idea of size without a point of reference... Just don't drop it!