It was listed by Terrier Antiques at Hebden Bridge. Sold pieces stay on Sellingantiques as a record of what has passed through, and the next one is rarely far away.
Terrier Antiques at Hebden Bridge has dated this Burr Yew Sewing Box to the 1800s.

Both Side sections open by removing brass vertical holding pins and have brass ringed handles and the box itself has two larger brass semi-circular carry handles, the interior of the main box has a sloping section for writing or painting and upon raising that a storage area beneath.
c1830
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Terrier Antiques at Hebden Bridge has dated this Burr Yew Sewing Box to the 1800s.
You can view the stock and full dealer information on the Terrier Antiques at Hebden Bridge Profile Page