Message:

<p>[QUOTE=&quot;Finn235, post: 3622511, member: 98035&quot;]To my knowledge, the oldest un-patinated bronze coins are from the 1600s or early 1700s. Silver does tarnish more easily, but copper is quite reactive to organics. To go more than a few centuries without developing a patina, a copper coin would proably have to be conditions like a modern slab, touching inert material and surrounded by inert nitrogen.</p><p><br /></p><p>The difference in silvered coins is that the thin silver wash still protects the coin from the environment.</p><p><br /></p><p>(Thats a really nice Probus by the way!)[/QUOTE]</p><p><br /></p>

Your name or email address:

Do you already have an account?

• No, create an account now.
• Yes, my password is:
• Forgot your password?

Stay logged in