SEIKO A158-5040 Inner circumference of the belt: Approximately 5cm This is an old Seiko digital watch from the 1970s? It has been stored with a dead battery for a long time. Currently, it is not working. It is unknown whether it will function normally after replacing the battery, so please consider it as junk. Please check the condition of the exterior in the images. Please purchase with the understanding that this is a non-working watch that has been stored by an individual. Operation...Defective (non-working) Scratches/Cracks etc....Yes