24.90 mm x 20.00 mm (outside), 23.60 mm x 14.80 mm (inside), O-shape plastic flange type crystal, to fit Vintage Tissot® case number 38674, SPU876
* 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.