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<p>[QUOTE=&quot;Collect89, post: 1567932, member: 15445&quot;]1. Why Lincoln Cent and Jefferson Nickel has a plain edges?</p><p>This is because they are made of base metals &amp; would not normally be clipped or shaved to remove precious metal.</p><p><br /></p><p>2. Why Roosevelt Dime, Washington Quarter and Kennedy Half has a reeded edges?</p><p>They were silver coins &amp; needed to be resistant to clipping or shaving of their valuable silver metal (until clad coinage was introduced in 1965)</p><p><br /></p><p>3. How many ridges are on a Roosevelt Dime, Washington Quarter and Kennedy Half?</p><p>Modern dimes have 118, quarters have 119, and half dollars have 150 ridges (which we call reeding).</p><p><br /></p><p>4. Why such quantity of ridges on a Roosevelt Dime, Washington Quarter and Kennedy Half?</p><p>The type of reeding can indicate the origin of the coin (mint) &amp; allows identification of the denomination from the edge pattern (vending machine counterfeit detection).[/QUOTE]</p><p><br /></p>

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