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Casio G-Shock Master of G Mudman GW-9500: Features, Specs and Versions

The GW-9500 MUDMAN pairs a duplex LCD and four outdoor sensors with Tough Solar and Multiband 6. Compare its listed specs, accuracy limits, size and display variants.

By WatchRanker Team 4 min read
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The Casio G-Shock GW-9500 MUDMAN is a large, mud-resistant digital watch with a compass, barometer, altimeter and thermometer, plus Tough Solar charging and Multiband 6 radio time calibration. Its duplex LCD puts compass graphics on an upper display layer and time and other readings below. It is built for rugged outdoor use, but its sensor accuracy limits mean it should not be treated as a precision navigation or weather instrument.

What the GW-9500 does

The GW-9500 is part of G-SHOCK’s Master of G MUDMAN line. Casio lists shock resistance, mud resistance and 200-meter water resistance, along with a Carbon Core Guard structure. Its oversized front and sensor buttons are protected by cylindrical steel components and gasket fittings, a design intended to keep mud and water out while making the controls easier to operate.

Its four headline sensors are a digital compass, barometer, altimeter and thermometer. Other listed functions include sunrise and sunset display, stored altitude records, world time, a stopwatch, countdown timer, five daily alarms and full-auto LED illumination. These are useful tools to have on the wrist, but readings should be interpreted within the accuracy and operating limits below.

How the duplex LCD is arranged

The dual-layer, or duplex, LCD places compass graphics on the upper layer, with the time and other measurements shown below. Casio presents this arrangement as a way to make compass information easier to read alongside other data. That is the manufacturer’s design rationale; the official material does not establish a comparative readability test.

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Display appearance varies by model suffix. Casio identifies the GW-9500-3 and GW-9500-1A4 as negative dual-layer LCD variants. Check the exact suffix and product images before buying if display contrast or appearance matters to you.

Sensor ranges and accuracy limits

Casio gives the sensors defined measurement ranges and accuracy limits. The ranges describe what the functions can display; they do not mean the watch measures with surveying or laboratory precision.

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Function Casio-stated range Casio-stated accuracy
Digital compass 0°–359°; 16-point direction Within ±10° inside the guaranteed temperature range
Barometer 260–1,100 hPa Within ±3 hPa
Altimeter −700 to 10,000 m Within ±75 m
Thermometer Not stated in the cited guide Within ±2°C

The ranges are specified in Casio’s 2023 launch release; the accuracy figures come from Casio’s Operation Guide 5682. Accuracy can be affected by strong impact or prolonged exposure to temperature extremes, according to the guide. For the thermometer, body heat from wearing the watch can make a wrist reading differ from ambient air temperature, so it is not a laboratory-grade ambient measurement.

The compass, altimeter and barometer are wrist-based aids, not substitutes for dedicated navigation or weather equipment when a decision depends on precision. The altimeter and barometer provide measurements within stated limits, and users should account for those limits when interpreting a reading.

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Solar charging and radio time calibration

Tough Solar charges the watch from light. Casio estimates approximately six months of operation after a full charge without further light under its stated normal-use conditions. Its product specification also gives approximately 26 months in total darkness with power saving enabled. These are manufacturer operating estimates, not guarantees for every use pattern.

Multiband 6 is the GW-9500’s radio-controlled time-adjustment feature. Casio identifies calibration stations in Germany, the UK, the United States, Japan and China. Reception depends on signal availability and setup; the presence of radio calibration does not guarantee successful reception in every location or indoors.

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Size, construction and water resistance

Casio’s current international specification lists the case at 56.7 × 52.7 × 14.8 mm and the watch at 81 g. The 52.7 mm width and 14.8 mm thickness make this a broad, substantial digital watch; those dimensions are worth comparing with a watch you already find comfortable, especially if your wrist is small or you prefer compact cases. That is a fit consideration inferred from the listed measurements, not a hands-on wear test.

Casio rates the watch for 200-meter water resistance and lists mud resistance and shock resistance. Follow the manufacturer’s operating and care guidance for the watch; a rating is not a reason to assume every use condition is suitable.

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GW-9500 versions: what to check before buying

Casio lists three versions: GW-9500-1, GW-9500-3 and GW-9500-1A4. The -3 and -1A4 are specified with negative dual-layer LCDs. Since the suffix affects the display variant, confirm the full model number on the listing rather than relying on a shortened “GW-9500” title.

Model Display detail established by Casio Buying check
GW-9500-1 Casio lists this model; the cited material does not identify it as a negative LCD variant Check the listing photos and full suffix
GW-9500-3 Negative dual-layer LCD Confirm that the negative display is the look you want
GW-9500-1A4 Negative dual-layer LCD Confirm that the negative display is the look you want

Casio’s cited product pages do not establish current retailer pricing or stock. If you are considering a replacement band, verify compatibility for the exact GW-9500 reference rather than assuming a generic G-SHOCK strap will fit.

Who should consider the GW-9500?

  • It may suit you if you want a mud-resistant, solar-powered digital watch with several outdoor sensors and a large, information-rich display.
  • Check the fit first if you prefer small watches: the listed case is 52.7 mm wide and 14.8 mm thick.
  • Choose the version deliberately if the LCD appearance matters; Casio identifies the -3 and -1A4 as negative-display models.
  • Look elsewhere if you require GPS positioning or precision-grade environmental measurements; the GW-9500’s listed functions and sensor accuracy do not establish either capability.

Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.

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