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<p>[QUOTE="mikediamond, post: 2296345, member: 1859"]There are rare circumstances in which you can get a strong peripheral design and design rim and nothing in the center. You can sometimes get a centralized, bifacial accumulation of "grease". A centralized die subsidence (sunken die) error can have the same effect. An extremely strong planchet proto-rim in combination with excessive minimum die clearance can also produce centralized design absence. However, I doubt any of these circumstances apply here. The center of the design was mechanically removed on both faces. It's a common alteration that is here betrayed by the numerous find scratches seen on both faces.[/QUOTE]</p><p><br /></p>
[QUOTE="mikediamond, post: 2296345, member: 1859"]There are rare circumstances in which you can get a strong peripheral design and design rim and nothing in the center. You can sometimes get a centralized, bifacial accumulation of "grease". A centralized die subsidence (sunken die) error can have the same effect. An extremely strong planchet proto-rim in combination with excessive minimum die clearance can also produce centralized design absence. However, I doubt any of these circumstances apply here. The center of the design was mechanically removed on both faces. It's a common alteration that is here betrayed by the numerous find scratches seen on both faces.[/QUOTE]
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