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<p>[QUOTE="cpm9ball, post: 3294002, member: 24633"]Welcome to the neighborhood, Don!</p><p><br /></p><p>The term "proof" refers to the method of manufacture. Specially prepared planchets are struck by polished dies producing a mirror finish. The planchets are also struck at least twice to ensure that the design is clear and sharp. Note: Coins produced for normal circulation are struck just once. The Mint did not start using plastic cases for the proof sets until 1968.</p><p><br /></p><p>Chris[/QUOTE]</p><p><br /></p>
[QUOTE="cpm9ball, post: 3294002, member: 24633"]Welcome to the neighborhood, Don! The term "proof" refers to the method of manufacture. Specially prepared planchets are struck by polished dies producing a mirror finish. The planchets are also struck at least twice to ensure that the design is clear and sharp. Note: Coins produced for normal circulation are struck just once. The Mint did not start using plastic cases for the proof sets until 1968. Chris[/QUOTE]
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