Bulova® Case Back Gasket BU-G4090
o-ring, case reference C4312, C4389, C4438, C4439, outside diameter 21.50 mm, inside diameter 20.50 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.