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Casio G-Shock GA-2100-1AER vs. Casio G-Shock GPR-B1000-1 + 5
Clock face
Black
Black
Black, Grey
Grey, Blue, Silver
Black
Black, White
Blue
Colour of bracelet
Black
Black, Grey, Green
Black
Silver
Black
Silver
Type of hands
Analogue (clockwork), Digital
Digital
Digital
Analogue (clockwork)
Analogue (clockwork), Digital
Analogue (clockwork)
Analogue (clockwork)
Thickness
12 mm
20 mm
12.7 mm
10 mm
18 mm
8 mm
13 mm
Width
45 mm
57 mm
46 mm
28 mm
59.5 mm
37 mm
44 mm
Features
Date display, Chronograph, Lighting, Timer, World time, Shock resistant, Stopwatch, Alarm, Luminescent
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, Luminescent
Date display, Chronograph, Lighting, Temperature sensor, Timer, World time, Shock resistant, Radio controlled, Barometer, Stopwatch, Altimeter, Alarm, Compass, Solar power
Date display
Date display, Luminescent
Water resistance (max depth)
200 m
200 m
200 m
300 m
200 m
100 m
200 m
Water resistance (max pressure)
20 ATM
20 ATM
20 ATM
30 ATM
20 ATM
10 ATM
20 ATM
Bracelet (material)
Resin Band, Rubber, Gold, Silicone
Resin Band, Rubber, Silicone
Resin Band, Rubber, Silicone
Steel
Textile, Steel, Resin Band, Rubber, Silicone
Textile, Nylon
Steel, Silver
Case
Plastic / Synthetic
Stainless steel
Stainless steel, Plastic / Synthetic
Stainless steel
Stainless steel
Titanium
Silver, Stainless steel
Type of glass
Mineral glass
Sapphire glass
Mineral glass
Sapphire glass
Sapphire glass
Mineral glass
Mineral glass
Primary power source
Battery
Battery
Battery
Battery
Battery
Battery
Automatic