
Reference: PRG-340ANS-3 (NACS-J Collaboration - Japan)
This watch is a tribute to nature. Designed in collaboration with the Japan Nature Conservation Society to celebrate its 50th anniversary, this model is inspired by the Japanese concept of “Satoyama” (the area where mountains, forests, and humans coexist in harmony).
Based on the advanced PRG-340, it stands out for its extensive use of biomass plastics (derived from castor beans and corn) in the case, band, and case back, reducing its carbon footprint.
Exclusive Design: The dial features a subtle camouflage pattern that mimics the topography and flora of Japanese forests. The NACS-J logo (the “Sashiba” falcon) appears in the backlight and is engraved on the back cover.
Superior Readability: Features Pro Trek's famous Duplex LCD screen, which superimposes the compass over the time for intuitive navigation.
TECHNICAL SPECIFICATIONS
Brand: Casio PRO TREK
Edition: Limited Edition (Nature Conservation Society of Japan)
Reference: PRG-340ANS-3
Movement: Tough Solar (Solar Charging) - Module 3513
Sensors: Triple Sensor Ver. 3 (Compass, Barometer/Altimeter, Thermometer).
Case and Construction:
Material: Biomass Resin (Eco-friendly and lightweight).
Bezel: Directional rotating (for orientation).
Dimensions: 54.7 × 51.7 mm.
Thickness: 15.1 mm.
Weight: 54 g (Extremely lightweight, you won't even feel it in the mountains).
Glass: Mineral.
Water Resistance: 100 Meters (10 BAR) - Suitable for swimming and trekking in heavy rain.
Cold Resistance: Operates down to -10°C.
OUTDOOR FUNCTIONS (Triple Sensor)
Digital Compass: With superimposed graphic display (Duplex LCD) and course memory.
Altimeter: Range -700m to 10,000m, with memory records (30 manual + auto) and altitude trend graph.
Barometer: Atmospheric pressure trend graph (alert for sudden weather changes/storms).
Thermometer: Range -10°C to 60°C.
Tough Solar: Stable solar charging system. Battery level indicator.
Sunrise and Sunset: Exact time of sunrise and sunset for any date (vital for route planning).
Other Functions:
World Time (48 cities).
Stopwatch (1/10 sec) and Timer.
5 daily alarms.
LED light: Super Illuminator (Full Auto) with the falcon logo in the background.
⚠️ STYLE AND USE NOTE
Color: It is a very natural, matte forest green, not at all garish. It is designed to blend in with the environment.
Screen: Duplex LCD technology is what sets this Pro Trek apart from regular G-Shock watches. The separate layers make reading the compass much clearer than on other digital watches.
Ergonomics: Thanks to the movable lugs that attach the strap to the case, the watch fits perfectly on the wrist and lies flat, which is ideal for reading maps or using trekking poles.
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