This is the original case back gasket / O-ring for various Seiko models. See the list for suitable calibres / models below. Please contact us if you're not sure whether this gasket suits your watch. This gasket is suitable for among others the following calibres / case numbers: (please contact us to check if this is the correct o-ring for your watch) 8F33, 5D44, 5D88, 7J21, 4S15, 7T62 0BB0, 5J32 0A10, 8F56, 9F82, 9F83, 9F62, 7T92 0HY0, 8F32, 7T11, 7N43, V657, 5Y89, 5D22, 9S61, V654, 7T62-0GR0, V145-0CB0, V145-0CH0, V147-0AF0, V14J-0AX0, 7N42-0DG0, 7N42-0FN0, 7N42-0FR0, 7T62-0HJ0, 8F56-0020, 7N42-8A90, 7T62-0DP0 Product Specifications Brand Seiko Gasket ref. FE308BAD2 Need an other gasket or other watch part for this watch model or any other model? Don't hesitate to contact us, then we'll help as soon as possible!