Message:

<p>[QUOTE=&quot;Lehigh96, post: 3240114, member: 15309&quot;]Unless someone can prove that mint used a different supplier for nickel planchets for those years, and those years only, I find that explanation to be very unlikely.&nbsp; And when I say supplier, it may be a series of suppliers in the production of the planchets.</p><p><br /></p><p>NGC offers a metallurgical analysis service.&nbsp; I would assume they use an SEM for composition, but I don’t know for sure.&nbsp; We could submit a proof from the 50s and 60s and see what happens.</p><p><br /></p><p>I think your theory of the OGP plastic is more likely than trace elements in the metals.&nbsp; Regardless of the composition of the metal, the toning is still a thin film interface.[/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