This is the original bezel gasket / o-ring for the Seiko V175-0AD0 & many more watches. 

This gasket is suitable for the following case numbers:

5M85-0AB0, 7546-6040, 7A38-6020, 7A38-7050, 7T12-0AB0, 7T12-0AG0, 7T34-6A00, 7T62-0EB0, 7T92-0JG0, 9F61-0AF0, 9F61-0AL0, 9F61-0AM0, V157-0BN0, V157-0BS0, V157-0BT0, V175-0AD0, V175-0EV0, Y182-7C20

Suitable models:

SSC019, SBGX115, SBGX117, SBGX335, SBGX337, SBGX339, SUN019