![4.00 mm Thick Flat Round Mineral Crystal (43.5 mm to 50.0 mm)](http://perrinwatchparts.com/cdn/shop/products/CR-FT400_SERIES_14fb0ebd-ecad-487e-9a58-7d9aa22b8b0a_300x114.jpg?v=1684873454)
4.00 mm round mineral crystals can be fitted into a gasket. Can be cemented directly into the seat of the bezel but not recommended. This crystal is finished with a polished top edge.
4.00 mm round mineral crystals can be fitted into a gasket. Can be cemented directly into the seat of the bezel but not recommended. This crystal is finished with a polished top edge.