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Celebrate 50 years of Casio watches with a transcendent PRO TREK that symbolizes Casio’s determination to stay true to who we are, while constantly innovating. The PRO TREK PRW-61SS features a special commemorative color scheme and design with Casio colors, materials, and finishes that evoke the omnipresent yet ever-changing nature of the sky, the sea, and the sunlight — shining today and forevermore. The design features a dial ring laser-etched with a fluted pattern. The logo is engraved on the case back, paying homage to the first-ever Casiotron released back in 1974. This very special 50th anniversary-worthy PRO TREK embodies both the origin of Casio watches and the half-century of groundbreaking innovation that followed.

    Basic Information

    Case size (L× W× H)
    51 × 47.4 × 14.7 mm

    56 g

    Case and bezel material
    Resin / Stainless steel / Resin (Bio-based)

    Cloth Band

    Water resistance
    100-meter water resistance

    Environmental resistance
    Low-temperature resistant (-10℃/14℉)

    Time adjustment
    Radio-controlled Watch; Multi band 6

    Power supply and battery life
    Tough Solar (Solar powered)

    Sensor feature
    Digital compass
    Measures and displays direction as one of 16 points
    Measuring range: 0 to 359°
    Measuring unit: 1°
    60 seconds continuous measurement
    Hand indication of north
    Bidirectional calibration
    Magnetic declination correction
    Measuring range: -700 to 10,000 m ( -2,300 to 32,800 ft.)
    Measuring unit: 1 m (5 ft.)
    Hand indication of altitude differential
    Manual memory measurements (up to 30 records, each including altitude, date, time)
    Auto log data (High/low altitudes, cumulative ascent and descent)
    Others: Relative altitude readings (±100m /±1000m),
    Selectable measurement interval: 5 seconds or 2 minutes
    *1 second for first 3 minutes only
    *Changeover between meters (m) and feet (ft)
    Display range: 260 to 1,100 hPa (7.65 to 32.45 inHg)
    Display unit: 1 hPa (0.05 inHg)
    Hand indication of pressure differential
    Atmospheric pressure tendency graph
    Barometric pressure tendency information alarm (beep and arrow indicates significant changes in pressure)
    *Changeover between hPa and inHg
    Display range: -10 to 60℃ (14 to 140℉)
    Display unit: 0.1℃ (0.2℉)
    *Changeover between Celsius (℃) and Fahrenheit (℉)


    Mineral Glass

    Screw Lock Crown

    Surface treatment
    Blue ion plated bezel

    Compatible band size
    145 to 215 mm


    Watch Features

    World time
    World time: 29 time zones (29 cities + coordinated universal time), One-touch UTC Time Zone Access, daylight saving on/off, Home city/World time city swapping

    1/100-second stopwatch
    Measuring capacity: 23:59'59.99''
    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 minute to 60 minutes (1-minute increments)

    Alarm/hourly time signal
    5 daily alarms
    Hourly time signal

    Double LED light
    LED light for the face (Full auto LED light, Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow)
    LED backlight for the digital display (Full auto LED light, Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow)

    Light color

    Full auto-calendar (to year 2099)

    Mute feature
    Button operation tone on/off

    Hand home position correction feature
    The auto hand home position correction

    Energy saving feature
    Power Saving (display goes blank and hands stop to save power when the watch is left in the dark)

    Battery display/alert
    Battery level indicator

    Run time
    Approx. battery operating time:
    6 months on rechargeable battery (operation period with normal use without exposure to light after charge)
    25 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge)

    Accuracy: ±15 seconds per month (with no signal calibration)

    Other features
    12/24-hour format
    Hand shift feature (manual or auto (during altitude, barometric pressure, and temperature measurement))
    Regular timekeeping:
    Analog: 3 hands (hour, minute (hand moves every 10 seconds), second)
    Digital: Hour, minute, second, am/pm, month, date, day

    Time adjustment details: (Not available in New Zealand)
    Time Calibration Signals
    Station name: DCF77 (Mainflingen, Germany)
    Frequency: 77.5 kHz
    Station name: MSF (Anthorn, England)
    Frequency: 60.0 kHz
    Station name: WWVB (Fort Collins, United States)
    Frequency: 60.0 kHz
    Station name: JJY (Fukushima, Fukuoka/Saga, Japan)
    Frequency: 40.0 kHz (Fukushima) / 60.0 kHz (Fukuoka/Saga)
    Station name: BPC (Shangqiu City, Henan Province, China)
    Frequency: 68.5 kHz
    Time calibration signal reception
    Auto receive up to six* times a day (remaining auto receives canceled as soon as one is successful)
    *5 times a day for the Chinese calibration signal
    Manual receive
    The latest signal reception results

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