32.40 mm x 3.50 mm (thick) flat-top, domed bottom, mineral crystal with bevel, generic (not original) to fit case number OS-501M 101 GC. Using generic crystals may devalue your watch.
* H. & W. Perrin Company Limited is independent of and not affiliated with or sponsored by Orient®. Orient® warranty does not apply to parts supplied by H. & W. Perrin Company Limited.