Message:

<p>[QUOTE=&quot;Conder101, post: 3447783, member: 66&quot;]One correction to your listing of the Sheldon scale, &quot;known&quot; is not used for R-1 thru R-4.&nbsp; They are listed as &quot;estimated&quot; because once you get past R-5 there are too many to really count &quot;known&quot; specimens.&nbsp; There are too many of them and they change hands too often.&nbsp; It becomes very difficult when you see one to know if it is one you have seen before.&nbsp; It is a heck of a lot easier to track known specimens when you are dealing with less than 75 pieces[/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