G-SHOCK GA-B2100LUU-8ADR - G1649 1513877 While the latter are powered

While the latter are powered mostly by a battery

Sku: FS5923 Case Size: 42 mm Movement: Quartz Platform: DAYLINER Strap Material: Leather sourced from LWG certified tannery Water Resistance: 5 ATM Case Material: Stainless Steel Case Color: Silver Dial Colour: Blue Strap Fashion Colour: Medium Brown Interchangeable Compatibility: 22 mm Strap Width: 22 mm Closure: Single Prong Strap Buckle Strap Inner Circumference: 200 +/- 5 mm Battery Type: SR626SW

This electronic timepiece features a quartz crystal that oscillates when current is applied to it

personalised caseback with edelweiss engraving

G-SHOCK GA-B2100LUU-8ADR - G1649 1513877 While the latter are powered