Casio to release PRO TREK timepiece designed with Mammut

Casio have announced the release of the latest addition to the PRO TREK line of outdoor watches.

The new PRW-61MA is a collaboration model designed with the Swiss outdoor brand Mammut.

Founded in Switzerland in 1862, Mammut provides apparel, footwear, backpacks and other outdoor gear. Combining sophisticated design with extreme functionality, the brand has earned legions of fans who love Mammut products for both outdoor adventuring and everyday wear.

This latest release, the PRW-61MA, brings PRO TREK and Mammut together for a design that is perfect for an urban outdoor lifestyle.

The watch comes with a cloth band and interchangeable soft urethane band that suit a variety of different occasions and clothing styles. The primary cloth band features the monochromatic Mammut Alpine all over print of spectacular views of snowy mountains for which the outdoor brand’s designs are known. The tag on the band is embroidered with the Mammut mammoth logo. The soft urethane band is a simple black design with the mammoth logo on the band loop for everyday wear. The timepiece also incorporates the signature Mammut orange on the brand name logo on the watch dial, the hour and minute hands, buttons, and other design accents.

Another important aspect of this collaboration is both brands’ commitment to environmental conservation. Mammut focuses on eliminating hazardous substances from its manufacturing processes as it develops sustainable products, and the PRO TREK is the first Casio line to incorporate watch parts made with eco-friendly biomass plastics, which were introduced in March 2022. Reflecting the passion for conserving nature that the two outdoor brands share, the PRW-61MA employs sustainable materials. The cloth band is made of recycled PET material from plastic bottles and other plastics, while the soft urethane band is made of biomass plastics using raw materials from castor seeds and corn. The case and case back are also made of biomass plastics.

In addition, the watch is equipped with the Tough Solar charging system, which effectively converts light from the sun, fluorescent lamps and other sources to power the watch, eliminating the need to regularly replace the battery, thereby further reducing environmental impact.


ConstructionLow-temperature resistant (–10°C/14°F)
Water Resistance100 meters
Radio Frequency77.5 kHz (DCF77: Germany); 60 kHz (MSF: UK); 60 kHz (WWVB: USA); 40 kHz (JJY: Fukushima, Japan) / 60 kHz (JJY: Kyushu, Japan); 68.5 kHz (BPC: China)
Radio Wave ReceptionAutomatic reception up to six times a day (except for use in China: up to five times a day); manual reception
Digital CompassMeasures and displays direction as one of 16 points; measuring range: 0° to 359°; 60 seconds continuous measurement; hand indication of north; bidirectional calibration and magnetic declination correction
BarometerMeasuring range: 260 hPa to 1,100 hPa (7.65 inHg to 32.45 inHg); measuring unit: 1hPa (0.05inHg); atmospheric pressure change indicator (±10hPa/1hPa); atmospheric pressure tendency graph; barometric pressure tendency information alarm
AltimeterMeasuring range: -700 m to 10,000 m (-2,300 ft. to 32,800 ft.); measuring unit: 1 m (5 ft.); manual memory measurements (up to 30 records, each including altitude, date, time); auto log data (high/low altitudes, cumulative ascent and descent); altitude change indicator (±100m/5m, ±1000m/50m); other: relative altitude readings; measurement interval setting (every 5 seconds / every 2 minutes)
ThermometerMeasuring range: -10°C to 60°C (14°F to 140°F); measuring unit: 0.1°C (0.2°F)
World Time29 time zones (29 cities + coordinated universal time), daylight saving on/off, home city/world time city swapping
Stopwatch1/100-second; measuring capacity: 23:59’59.99”; measuring modes: elapsed time, split time, 1st and 2nd place times
Countdown TimerMeasuring unit: 1 second; countdown range: 60 minutes; countdown start time setting range: 1 to 60 minutes (1-minute increments)
Alarm5 independent daily alarms, hourly time signal
Other FunctionsAuto hand home position correction; hand shift feature (manual or auto [during altitude, barometric pressure, and temperature measurement]); 12/24-hour format; button operation tone on/off; full auto double LED light (Super Illuminator and afterglow: 1.5/3.0 seconds); full auto-calendar
Power SourceTough Solar power system (solar-charging system)
Continuous OperationAbout 6 months after full charge, using all functions but without solar charging
About 25 months with the power-saving function ON after full charge
Size of Case51.0 × 47.4 × 14.7 mm
Total WeightApprox. 55 g

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