Genuine Casio Rubber Packing/ O-ring 74207539 fits AMW-104D/ L DW-6100/ 6500/ G
Product Code: 74207539. Casio Watch Case O-Ring. This Casio O-Ring case seal (gasket) is suitable for the following watch models Also known as a gasket, the O-Ring is made from rubber and is used to create an airtight seal.