A watch chain includes first and second sets of linked bases, each base including a body, a pair of parallel, curved, extending portions connected to opposite edges of the body, a projection positioned on a concave bottom of each extended portion for applying a finger-pressure, a beam fixedly mounted to and extending between ends of the extended portions, and an elliptical shaped arm having one end connected with the body and being movable between a raised position for inserting the beam of a second base between the arm and the body, and a folded position to fix the beam of the second base between the arm and the first body; a lock member connected to one end of the first set of linked bases; and a link member connected to one end of the second set of linked bases, with opposite ends of the first and second sets of linked bases being connectable to a watch.