Authenticating an ancient coin is not an act of faith but of method. One examines weight and diameter, die style, the metal's patina and, above all, documented provenance.
Each of those factors is checked against reference catalogues (RIC, SNG, Sear). Only when everything fits is the certificate of authenticity issued — the one that accompanies the piece for life.
Why provenance is decisive
A coin with a known history is worth more and is safer than one without a past. Our pieces come from the holdings of a numismatic house with decades of traceable acquisition.