Casio G-Shock 2100 Series Watch 'Monochrome Black'The Casio G Shock 2100 Series represents a refined evolution of the iconic G Shock lineage, engineered for those who demand durability without compromise. This monochrome black iteration delivers understated sophistication alongside legendary shock resistance and water protection up to 200 meters. The 2100 series refines the classic square case with a slimmer profile and improved comfort, while maintaining the robust construction that defines the