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<p>[QUOTE=&quot;Al Kowsky, post: 3563117, member: 97383&quot;]The <b>Oxford Dictionary </b>defines <b>patina</b> as: a green or brown film on the surface of bronze or similar metals, produced by oxidation over a long period.</p><p><br /></p><p>[ATTACH=full]947392[/ATTACH] </p><p><br /></p><p>My favorite coin sporting an attractive patina is the Byzantine bronze 40 nummi coin above. Justinian I, struck in Year 13 (AD 539-540), 42 mm, 23.23 gm.[/QUOTE]</p><p><br /></p>

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