AV Histamenon nomisma (Syphate); Almost 1,000 years old!
This gold coin is from the reign of Constantine X, ruler of the Byzantine empire from 1059 - 1067 AD. Approximate specifications: (24/28mm - 4.0-4.6g).
Obverse: Christ seated on throne.
Reverse: Constantine standing with scepter and orb.
Graded Extra Fine by NGC!