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<p>[QUOTE=&quot;Joshua Lemons, post: 24579903, member: 82388&quot;]In general, reference numbers are assigned by experts in particular series, errors, etc.&nbsp; Anyone could use their own, but likely noone else would use them unless they were an authority on the type.&nbsp; Also, I find most reference numbers trivial for my type of collecting aside from KM#&#039;s, but if you decide to specialize in certain series/types, then you may well need to know reference number for that specialty.[/QUOTE]</p><p><br /></p>

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