Nerone (54-68), Asse, Lugdunum, 64-67 d.C.; AE (g 11,30; mm 30; h 6); IMP NERO CAESAR AVG P MAX TR P P P, testa nuda a d., globo alla base del collo, Rv. GENIO - AVGVSTI, Genio stante verso s., tiene cornucopia e patera; davanti a lui, un altare; ai lati, S - C. RIC 533; C 103.
Patina rossa in cuprite, q.spl.
Restoration and cleaning report: this Sestertius of Nero came to my attention with a green patina which showed morphological characteristics and crystallization due to repatination. Under stereoscopic magnification (100X) was mechanically removed this layer, showing an original dark-brownish patina with scattered cuprite crystals on both sides of the coin.
Completing the cleaning of the reverse, I observed the reparation of a corrosion
with epoxy material, corrosion due to a cuprite formation of cuprite place on the right side of the field. I believe that this accurate cleaning operation returned the coin to its delicate and refined definition.
Prof. Gianni Pierbattisti, Conservator Safe Coins s.r.l.