![Bulova® Case Back Gasket, (click here for case references)](http://perrinwatchparts.com/cdn/shop/products/BU-G787_286x300.jpg?v=1688063431)
Bulova® Case Back Gasket,
o-ring, case reference 221, 388-6, 388-7, 394-2, 399, 4 , 400-1, 474, 474-1, 474-2, 485, 485-1, 486, 486-1, 487, 536, 536-1, 537, 538, 545, 569, 569-1, 575, outside diameter 30.90 mm, inside diameter 29.10 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.