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Casio G-Shock GA-2100-1AER vs. Casio G-Shock GST-B200-1A + 5
Clock face
Black
Black, Grey
Black
Black, Grey
Black
Black
Black
Colour of bracelet
Black
Black, Blue
Black, Grey, Green
Black
Black
Silver
Silver
Type of hands
Analogue (clockwork), Digital
Analogue (clockwork), Digital
Digital
Digital
Analogue (clockwork), Digital
Analogue (clockwork)
Analogue (clockwork)
Thickness
12 mm
15 mm
20 mm
12.7 mm
18 mm
14 mm
Width
45 mm
50 mm
57 mm
46 mm
59.5 mm
43 mm
42 mm
Features
Date display, Chronograph, Lighting, Timer, World time, Shock resistant, Stopwatch, Alarm, Luminescent
Date display, Chronograph, Lighting, Timer, World time, Shock resistant, Bluetooth, Stopwatch, Alarm, Luminescent, Solar power
Date display, Chronograph, Shock resistant, Bluetooth, Stopwatch, Altimeter, Alarm, Solar power
Date display, Chronograph, Lighting, Timer, World time, Shock resistant, Radio controlled, Stopwatch, Alarm, Solar power
Date display, Chronograph, Lighting, Temperature sensor, Timer, World time, Shock resistant, Radio controlled, Barometer, Stopwatch, Altimeter, Alarm, Compass, Solar power
Date display, Chronograph, Stopwatch, Luminescent
Date display, Chronograph, Luminescent
Water resistance (max depth)
200 m
200 m
200 m
200 m
200 m
300 m
50 m
Water resistance (max pressure)
20 ATM
20 ATM
20 ATM
20 ATM
20 ATM
30 ATM
5 ATM
Bracelet (material)
Resin Band, Rubber, Gold, Silicone
Resin Band, Rubber, Silicone
Resin Band, Rubber, Silicone
Resin Band, Rubber, Silicone
Textile, Steel, Resin Band, Rubber, Silicone
Steel
Steel
Case
Plastic / Synthetic
Silver, Stainless steel
Stainless steel
Stainless steel, Plastic / Synthetic
Stainless steel
Stainless steel
Stainless steel
Type of glass
Mineral glass
Mineral glass
Sapphire glass
Mineral glass
Sapphire glass
Sapphire glass
Hesalite
Primary power source
Battery
Battery
Battery
Battery
Battery
Battery
Manual