19.60 mm x 19.60 mm (outside) 18.40 mm x 18.40 mm (inside) Y-shape plastic flange type crystal, supplied with gasket, to fit Vintage Tissot® case number 35800-02
* H. & W. Perrin Company Limited is independent of and not affiliated with or sponsored by Tissot®. Tissot® warranty does not apply to parts supplied by H. & W. Perrin Company Limited.