Casio Watch Parts DBC-62 Back Plate Gasket. Also fits: (see list in description)

Casio original back plate gasket made specifically for models:
DBC-61, DBS610, DBX-102M, DBX-103, DBX-112

All Casio model numbers are engraved on the back plate.

Typically a series of letters-a dash-series of numbers i.e. DBC-62