Weight discrepancies: Due to manufacturing tolerances, the weight of the coins can slightly vary from the stated weight (31.1 g or 30 g). However, this is an industry-standard and does not impact the coin's authenticity or value. Finish variation: The temple side of the coin may have slight differences in appearance due to variations between factories. For example, the 2015 Silver Panda has two different finish types on the temple side: one is more frosty, while the other is more mirror-like.Rest assured, these variations do not affect the coin's quality or value. Quality assurance: Each coin is rigorously tested with Sigma Metalytics equipment to ensure its purity and authenticity. We are committed to providing you with genuine and high-quality products. We're here to help and ensure your satisfaction.