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<p>[QUOTE=&quot;Anyiquesbyjewels, post: 11308035, member: 18988&quot;]This second engraving is not a maker mark. It is probably:</p><p><br /></p><p><br /></p><p><br /></p><p>What “D678 = 5” means</p><p><br /></p><p><br /></p><p><br /></p><ul> <li>“D” = diamonds</li> <li>“678” = internal work order or design number</li> <li>“= 5” = total weight or number of diamonds<ul> <li>There are 5 diamonds on the ring, which matches.</li> </ul><br /> <br /> This strongly suggests the ring was made by a small workshop, custom jeweler, or regional jewelry manufacturer, not a mass-market brand.<br /> <br /> <br /> <br /> Possible origin<br /> <br /> <br /> <ul> <li>American studio jeweler, late 60s–70s</li> <li>Could also be from a small New York, California, or Chicago workshop (these were hubs for brutalist pieces)</li> <li>Designers like David Andersen, Guy Vidal, or Mexican modernists made similar styles, but your ring lacks their signature hallmarks.</li> </ul><br /> <br /> Without a stamp, the maker is probably a custom bench jeweler rather than a known brand.<br /> </li> </ul><p>[/QUOTE]</p><p><br /></p>

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