Japanese pendant watch made of finely engraved gilt brass. The case has a small holder for the key. The piece is in the shape of the small boxes called inrô, used to store personal seals, sealing wax, etc. The dial has twelve silver hour tiles that are shifted manually to compute the diurnal and nocturnal toki. The movement has a fusee, a train comprising four wheels and the contrate wheel, and a verge escapement.