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I just purchased this curio cabinet from a couple who is downsizing their home. They had the piece. About 25 years. It appears to be from the primitive time period. Any thoughts? It is a dovetail design at joints / corners. No manufacturer markings whatsoever so I believe that someone made it for personal use. Nails are extremely old, glass is dull and somewhat wavy. The top arch is made of small 8x2 pieces of wood.