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Casio G-Shock GA-2100-1AER vs. Casio G-Shock G-9300RD-4 + 2

Clock face
Black
Black, Grey
Blue
Colour of bracelet
Black
Silver
Type of hands
Analogue (clockwork), Digital
Analogue (clockwork)
Analogue (clockwork)
Thickness
12 mm
13.2 mm
11.8 mm
Width
45 mm
41.5 mm
41 mm
Features
Date display, Chronograph, Lighting, Timer, World time, Shock resistant, Stopwatch, Alarm, Luminescent
Shock resistant
Date display, Luminescent, Chronometer (COSC)
Date display, Luminescent, Chronometer (COSC)
Water resistance (max depth)
200 m
150 m
300 m
Water resistance (max pressure)
20 ATM
15 ATM
30 ATM
Bracelet (material)
Resin Band, Rubber, Gold, Silicone
Resin Band
Steel
Steel
Case
Plastic / Synthetic
Stainless steel
Stainless steel
Type of glass
Mineral glass
Mineral glass
Sapphire glass
Primary power source
Battery
Battery
Automatic
Automatic