AV Histamenon Nomisma (Syphate)!
This Gold coin is from the reign of Constantine X, emperor 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 Choice Extra Fine by NGC with a strike rating of 4/5, and a surface rating of 3/5.