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<p>[QUOTE=&quot;Conder101, post: 24697012, member: 66&quot;]There have been three grading services named HALLMARK.&nbsp; The first was a currency grading service from the early 80&#039;s.&nbsp; Strange holders that actually had holes in them so the paper could &quot;breathe&quot;.&nbsp; The second was the company partially owned by Q David Bowers that eventually sold there slab shell design to PCI.&nbsp; The third was a basement slabber that produced the slabs shown earlier in the thread.&nbsp; From the slab style and the use of the gold labels for sealing they may have been associated somehow with SGS (Star Grading Service AKA Abon coins)[/QUOTE]</p><p><br /></p>

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