I have collected Seiko watches for 50 years If you need advice on which gasket, tell me the 8 digit case back number I can check you have the correct part, or give you the correct part number 7S26 0020 GENERIC “O” RING – 1 PARTS rEPLACES Seiko OG330BA11post free Also fits 4S12-0020 7S36-01B0 7S26-0040 7S36-01S0 7S26-0170 H803-7001 7S26-01X0 H803-7008 7S26-0350 V657-8080 7S26-0351 W027-6010 7S36-00S0 W028-6020
