I have two on bid, does that count??? And, I wish I could access that link someone here previously posted about the use of 'magnifying devices' back in antiquity---apparently, they did have access to them, although I still find the intricate engraving on such tiny coins to be remarkable.
This Greek silver coin has Pegasus head-right on reverse. The obverse shows a face within incuse. Dimension is 12 mm, but the coin is thick and weighs 2.4 g. Could it have a denomination? I can't even tell in what century was it used or engraved.
Here's an article on ancient magnifying lenses: http://www.ancients.info/modules.php?name=Sections&op=viewarticle&id=20 Looks like a definite probably.
I have noted a big increase of interest in little coins meaning I have not been able to get many lately. You should stop paying so much and go back to chasing tetradrachms. It is hard to appreciate the size of these until you have them in hand. I consider 0.5g the start of 'tiny'. That pretty well rules out obols but allows fractions. Left row: 1. Syracuse, Sicily, hemilitron 440-430 BC, .3g 2. Athens, Attica, tritartemorion (3/4 obol), 393-300 BC, .5g 3. Therma, Macedon, hemiobol (1/2 obol), 510-480 BC, .3g 4.. Kolophon, Ionia, tetartemorion (1/4 obol), 430-400 BC, .2g - This coin is unusual in the monogram 'TE' on the reverse (over the cicada) indicating the denomination. 5. Kebren, Troas, tetartemorion (1/4 obol), 400-350 B.C. .2g Right Row: 1. Phocaea, 1/8? obol .1g 2. Mylassa, Caria, tetartemorion? (1/4 obol), 5th century BC, .1g 3. Hektatomnos, Satrap of Caria, tetartemorion 395-377 B.C., .2g 4. Syracuse, Sicily, Tyrant Gelon, hexas (1/6 litra or 1/300th of the popular dekadrachm), 485-478 BC, .05g? This is the lightest coin I have ever seen but the flaking surface of this specimen makes its weight lower than normal. 5. Rhegion, Bruttium, hemitatemorion (1/8 obol), 466-415 BC, .1g. I'm still looking for the one I want most. There is a 1/8 obol of Athens according to Sear but ones I have seen offered were either too large or from the East. It has the types of the tetradrachms but much smaller.
This lil' 5 mm x 8 mm is one of my tiny darlings ... IONIA, Ephesos, AR Tetartemorion Circa 500-420 BC Diameter: 5 x 8 mm Weight: 0.17 grams Obverse: Bee Reverse: Head of eagle right within incuse square oh, and I definitely agree with Doug => until you have one of these in-hand, it is difficult to realize just how small these things really are (I find it amazing that they have lasted thousands of years!!)