Bulova® Case Back Gasket BU-G4124
o-ring, case reference C863027, C863028, outside diameter 31.10 mm, inside diameter 29.70 mm
* H. & W. Perrin Company Limited is independent of and not affiliated with or sponsored by Bulova®. Bulova® warranty does not apply to parts supplied by H. & W. Perrin Company Limited. Using generic crystals may devalue your watch.