Message:

<p>[QUOTE=&quot;desertgem, post: 1651372, member: 15199&quot;]I wasn&#039;t arguing that. I was fairly sure at what point the 38.5 is determined as the nominal diameter as I can see where the collar would be a limiting wall when struck normally, but I am wondering what the temperature is of the coin when the dies begin to pull away from the struck coin and the collar releases. I could then calculate how much negative expansion ( shrinkage) of the diameter . A quick calc based on .999 silver shows that if the coin hit 400 degree F., and then cooled to room temp., the shrinkage on a 38.5 mm coin would be about .17mm.&nbsp; The idea that if the collar was 38.5 mm diameter, the coin in hand show be also if uncircuated is very common, and I think may well be incorrect.</p><p><br /></p><p>Jim[/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