Casio G-Shock Black Dial Men 53.8mm Leonardo the GMT 40 has an

the GMT 40 has an impressive 200m water resistance

Blood Oxygen Monitor

this analog-digital combination model features an updated dial design and hand shape

a strap with a divers' buckle and extension

Casio G-Shock Black Dial Men 53.8mm Leonardo the GMT 40 has anFrom G SHOCK, the watch that always strives for toughness, the first G STEEL lineup models to offer chronograph performance in analog format. Thought all the dials of these models are analog, they still boast G SHOCK level shock resistance. The dial at 9 o'clock has a multi functional rotating disk that is cut to resemble the thick blades of a jet engine. Rotation of the blades reveals red coloring behind the disk, and this change in color is used to