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<p>[QUOTE=&quot;rrdenarius, post: 2458165, member: 75525&quot;]I am a chemical engineer and took surveying in college. I found it interesting, but have not done any since. My dad had one or two in his home shop.</p><p>I bought a Roman p-b a couple of years ago. When it arrived, I could not find any information that corroborated that it was that old. When I started looking around, I found a couple of interesting web sites including:</p><p><a href="http://plumbbobcollectors.info/media//DIR_42117/DIR_42128/1ee8c70ab77920a2ffff8fa9ac144226.pdf" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://plumbbobcollectors.info/media//DIR_42117/DIR_42128/1ee8c70ab77920a2ffff8fa9ac144226.pdf" rel="nofollow">http://plumbbobcollectors.info/media//DIR_42117/DIR_42128/1ee8c70ab77920a2ffff8fa9ac144226.pdf</a></p><p>I became even more interested when I noticed one on a RR coin. I now have half a dozen or so p-b&#039;s. They are bronze and do not quite fall into pre-money items, but i think they are neat.[/QUOTE]</p><p><br /></p>

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