Caracalla - AE28 of Calchedon in Bithynia

     28 mm bronze Roman Provincial (or Greek Imperial) coin from
     Calchedon in the province of Bithynia. Obverse has a draped and
     cuirassed bust of Caracalla, reverse has tripod and snake. Greek
     legends. Well centered, legends complete, medium brown surfaces
     with lighter highlights. Obverse has somewhat grainy surfaces,
     reverse is more pronounced. Not listed in Sear or Lindgren.