This is a Sasanian silver coin graded and encapsulated by Beijing Gongbo Ancient Coin and Art Appraisal Co., Ltd. (GBCA). Historical Period: 591–628 AD (corresponding to the Sui and Tang Dynasties in China), belonging to the late Sasanian period, the height and decline of the dynasty. Ruler: Khosrow II, nicknamed "The Victorious King," was one of the most famous monarchs in Sasanian history. Grading Score: AU 50. In the coin grading system, AU represents "Near Uncirculated." A score of 50 means that the main details of the coin are clear, with only slight circulation wear, no serious bumps or scratches, making it a collector's item in good condition. Physical Parameters: Diameter 33.1mm, thickness 1.0mm, weight 3.9g, fully conforming to the minting specifications of the standard Sasanian drachma silver coin. Authentication Marks: Tag number 1710677235, with a GBCA anti-counterfeiting QR code and holographic label, guaranteeing its authenticity and condition.