![1.50 mm Magnifying Crystal (20.0 mm to 38.0 mm)](http://perrinwatchparts.com/cdn/shop/products/CR-MAGNIFY15_a38a8626-eb9f-426d-a9fe-0b5c07a69b5e_300x61.jpg?v=1684873507)
Domed top and flat bottom – aka Single Dome - approximate thickness at center is 3.00 mm. This crystal gives a domed look without the need for hand clearance and adds a slight magnification to the dial. This crystal is finished with a polished top edge.