31.30 mm (outside), 27.80 mm x 25.70 mm (inside), Y-shape plastic flange type crystal, to fit Vintage Tissot® case number 44805-2, 10336
* 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.