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<p>[QUOTE=&quot;physics-fan3.14, post: 7892891, member: 19165&quot;]For old coins, I usually prefer the look of the red-brown or brown pieces. They show their age, they have a patina, and I generally trust that they are more stable. </p><p><br /></p><p>However, if we&#039;re talking 20th century copper.... I&#039;ve seen enough red cents that were 50, 75, or older that had Red surfaces that seemed stable. I wouldn&#039;t pay an enormous premium for them, but if the coin is 75 years old and still has red surfaces.... you could feel okay that it will keep the red surfaces if stored properly.[/QUOTE]</p><p><br /></p>

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