10 Euro (2013) in silver (0,925) commemorating the Greek Culture / Philosophers - Pythagoras. Pythagoras and a schematic representation of the Pythagorean theorem on obverse. Inside slab by NGC "PF 69 ULTRA CAMEO / PYTHAGORAS". Cert number: 5775461-061. Accompanied by its official case of issue and CoA with no "0549". (Hellas CE.52).