chrono, 34.60 mm x 31.50 mm (top level) x 6.00 mm overall height/thickness plastic with white step type reflector ring. Using generic crystals may devalue your watch.
* H. & W. Perrin Company Limited is independent of and not affiliated with or sponsored by Swatch®. Swatch® warranty does not apply to parts supplied by H. & W. Perrin Company Limited.