![Wittnauer® Crystals CY-LONG57 D11AE, case REF 8510](http://perrinwatchparts.com/cdn/shop/files/CY-LONG57_300x300.jpg?v=1683040879)
27.80 mm x 26.10 mm Y-shaped plastic flange type crystal, original, Wittnauer® D11AE, case REF 8510
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