The number of jewels is 31. Self-winding with a safety device against over-winding of the spring. Frequency: 19800 half-vibrations/hour. The hour markers and hands are filled with fluorescent paint of variable action.
Casio F-91W-1 Classic Digital Watch. The legendary Casio F-91W is one of the world's most iconic digital watches. Casio F-91W Watch. ✓ 100% Authentic Casio Products. Authentic Casio. Casio F91W. 12/24 Hour Format.
Glass :sapphire glass. 300m water resistance. Luminous hands and dials. Case Material : Solid 316L stainless steel case. we will communicate with you to resolve all troubles perfectly. Case thickness :15.2mm.
Case Size:40mm without crown. --- Glass: Sapphire Crystal Glass. --- Watch Back:Solid Back or Glass Back. --- This Watch Dial Size:28.5mm. --- Water Resistance: 100m waterproof. --- Dial Color: Black/White/ice blue/Green/Blue Dial and Green Luminous.