Casio g-shock

Casio G-Shock Cockpit Series Watch G-1710D G1710D
Water resistant 200m (20 bar)
Shock resistant (G-SHOCK) Digital Timekeeping
Hour, minutes, seconds, p.m. month, day, day of the week
Time format: 12-hour and 24-hour
Calendar system: Full auto-calendar pre-programmed from the year 2000 to 2039
Other: 3 screen formats (Day of the Week, Month - Day, seconds);
Home City (can be assigned one of 31 city codes); Daylight Saving time (summer time)/ Standard time
Analog Timekeeping Hour, minutes (hand moves every 20 seconds)
Stopwatch Measuring unit: 1/100 second Measuring capacity 59'59.99"
Measuring modes: Elapsed time, split time, two finishes
World Time 27 cities (29 time zones)
Other: Daylight saving time / standard time
Countdown Timer Measuring unit: 1 second Countdown range: 60 minutes
Countdown start time setting range: 1 to 60 minutes (1-minute increments)
Other: Auto-repeat timing; progress beeper
Alarms 5 daily alarms (four one-time alarms; one snooze alarm)
Hourly time signal Illumination LED (light-emitting diode)
Selectable illumination duration (approximately 1 or 3 seconds) Auto Light Switch
Accuracy: ±15 seconds per month Approx. battery life: 3 years
Diameter of case/total weight 44mm / 140 g

Casio gshock Cockpit Series Watch G-511D G511D
Water resistant 200m (20 bar))
Shock resistant (G-SHOCK)
Electro-luminescent backlight
Afterglow World time29 time zones (27 cities),
city code display, daylight saving on/off
1/100-second stopwatch Measuring capacity: 59'59.99"
Measuring modes: Elapsed time, split time,
1st-2nd place times
Countdown timer
Measuring unit: 1 second
Countdown range: 60 minutes
Countdown start time setting range:
1 to 60 minutes (1-minute increments)
Others: Auto-repeat, time up alarm Daily alarms
5 independent daily alarms (4 one-time alarms and 1 snooze alarm)
Hourly time signal Auto-calendar (to year 2039)
12/24-hour format Regular timekeeping
Analog: 2 hands (Hour, minute)
Digital: Hour, minutes, seconds, pm, month, date, day
Accuracy: ±15 seconds per month Approx.
battery life: 3 years on SR927W X 2
Size of case/total weight
50.2 X 45.0 X 13.8 mm / 137 g