Crown Jack Pattern

A jack knife with the ends more-or-less squared off, wider at the cap end and having a slight swell in the middle. The Gunstock Jack is similar, but more exaggerated.

A Gunstock Jack has a similar but more exaggerated shape than a Crown Jack.

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Crown Jack Pattern

Copperhead Pattern

Cuticle Knife

Crown Pen (Modern) Pattern

Crown Pen Pattern

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