Mineral Bubble Magnifier Lens for Date Window Watch Crystals Excellent if struggling to see date due to our old age.These need to be glued on, GS hypo glue {not included) is ideal Two Shapes available:
Round shaped diameters3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm.
Retangular Shape Size:4.5mm x 3.5mm, 5.5mm x 4.5mm, 7mm x 5.5mm