18 mm (the firm I bought it from misdescribed it as 12 mm; I'm happy it was actually larger) and 1.54 grams. Unless you saw this same coin in the auction I bought it from, I'll bet you have not seen one before. I doubt many collectors care at all about the series, and, really, I don't either! I bought it for the "rabbit". The only evidence I have that it is a rabbit is what I see; I have no book reference and neither did the seller. Maybe it is a donkey. Steve Album, the Islamic coin expert, is a friend and when I asked him about it he tentatively attributed it to the Golden Horde, Sultan Al-A'zan. They were originally Mongols and then Turkic in the 13th and 14th centuries north and east of the Black and Caspian seas. I think he could read the legend, but I have been unable to find a reference to that sultan (Maybe on the web it is not spelled that way?) It has no "Album number." Steve told me that Golden Horde coinage has very many types and almost all the literature is in Russian and hardly known in the west. If anyone has anything they can contribute about this obscure type, chime in! Every once in a while I acquire something really obscure. I don't know what to make of it. Why did I even bid? Well, I like to do research on types and series I don't know. This one may be a bit too extreme--I haven't found sources that would enable me to learn about it. If you have something obscure to show, this would be a good thread for it.