Post-mint damage refers to any alteration or degradation that occurs to a coin after it has left the mint. Unlike mint errors, which are anomalies introduced during the manufacturing process, PMD is acquired through handling, environmental exposure, or deliberate actions. This damage can range from minor scratches to severe alterations, each affecting the coin’s aesthetic and market value differently.
Post-Mint damage
Post-mint damage can manifest in a myriad of ways, each with its characteristics and implications. Understanding these various forms is essential for collectors to accurately assess the condition of their coins. Some common types of PMD include:
Scratches and Abrasions: These are superficial marks typically acquired through handling or contact with other objects. Fine scratches might be barely noticeable, while deeper ones can significantly detract from the coin’s appearance.
Environmental Damage: Exposure to air, moisture, chemicals, or extreme temperatures can lead to tarnishing, corrosion, or verdigris (a green patina). These changes can alter the coin’s color, texture, and overall eye appeal.
Cleaning Damage: Improper cleaning methods can leave coins with a polished or overly bright appearance, which is generally undesirable. Harsh cleaning can also result in scratches, loss of original luster, or even wear down the coin’s relief.
Physical Alterations: This includes any form of deliberate modification, such as drilling, engraving, or bending. Such alterations are easily identifiable and typically render the coin of little interest to serious collectors, except in cases where the modification has historical or cultural significance.
