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<p>[QUOTE=&quot;GDJMSP, post: 8352450, member: 112&quot;]When you&#039;re talking about the Spanish colonial coins you have to pin things down by date to know how they were struck. Milled coinage did not begin until 1773 in Mexico City, the other mints changed at various times a bit later. Prior to 1773 the edge design was put on the coin by an edge die - the coin was physically rolled through the edge die. In and after 1773, that&#039;s when collars were used.</p><p><br /></p><p>As for the weight and tolerances, you can read about that here -</p><p><br /></p><p><a href="https://www.cointalk.com/threads/weight-range-for-spanish-8-reales.238204/#post-1810029" class="internalLink ProxyLink" data-proxy-href="https://www.cointalk.com/threads/weight-range-for-spanish-8-reales.238204/#post-1810029">https://www.cointalk.com/threads/weight-range-for-spanish-8-reales.238204/#post-1810029</a></p><p><br /></p><p>The diameter, yeah prior to milled coinage it was quite common for the diameter to vary slightly, or more than slightly, in different mints and within the same mint. But once milled coinage began the diameter became much more consistent. Maybe not exact all the time but much more consistent.[/QUOTE]</p><p><br /></p>

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