Q:We have an old wooden dining room set that includes a table with one leaf, four chairs and a china cabinet. The only mark I can find is “Jefferson Woodworking Co.” on the table’s extension rails. History and value?
A: Jefferson Woodworking Co. was in business in Louisville, Ky., in the late 1910s into at least the early 1920s. It did not make your table. It made table extension rails for various furniture manufacturers. Still, your set is close to 100 years old and could sell for more than $500 if it’s in excellent condition.