CHELSEA CLOCK USA SHIPS MARINE QUARTZ MAHOGANY BOX BRASS CHRONOMETER DECK WATCH - perfect working order. WORKS ON A SINGLE 1.5V BATTERY. THE INNER BOX IS HOUSED IN ANOTHER OUTER CASE AS IS SEEN IN THE PICTURES. THERE IS NO LATCH ON THE INNER BOX AS IT IS HOUSED IN THE OUTER BOX. PLEASE CHECK PICS FOR DETAILS