Casio PRW3500 Series | Pro Trek | 100M WR | Compass | Alt/Baro-Thermo | Tough Solar Power | Atomic Timekeeping | 1-100 SEC Stopwatch | Countdown Timer | World Time
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Availability:
In Stock.
Arrives
Thursday, Aug 20
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Color: Green
Style: PRW-3510Y-8CR
Product Dimensions : 4.35 x 4.65 x 3.8 inches; 3.32 ounces
Item model number : PRW3510Y-8
Department : mens
Batteries : 1 C batteries required. (included)
Date First Available : January 6, 2018
Manufacturer : Casio
Product Warranty: For warranty information about this product, please click here. [PDF ]
Best Sellers Rank: #305,258 in Clothing, Shoes & Jewelry (See Top 100 in Clothing, Shoes & Jewelry) #1,151 in Men's Wrist Watches
#1,151 in Men's Wrist Watches:
Display: Digital
Watch Movement Type: Quartz
Additional Features: Alarm, Benzel Marking, Compass, Second Hand, Water Resistant
Power Source: Battery Powered, Solar Powered
Strap Type: Two Piece Strap
Water Resistance Depth: 660 feet
Sport Type: marine activity, water sports
Clasp Type: Buckle
Water Resistance Level: Water Resistant
Embellishment Feature: Crystal
Closure Type: Buckle
Style Name: PRW-3510Y-8CR
Shape: Round
Band Color: Green
Dial Color: Black
Theme: Sports
Pattern: Solid
Face Style: Black
Brand Name: Casio
Model Name: TOUGH SOLAR
Included Components: Battery
Model Number: PRW3510Y-8
Series Number: 3500
Item Weight: 0.09 kg
Global Trade Identification Number: 16
Unit Count: 1 Count
Manufacturer: Casio
Number of Items: 1
UPC: 889232172316
Age Range Description: Adult
Item Type Name: Watch
Manufacturer Part Number: PRW-3510Y-8CR
Band Material Type: Silicon
Case Material Type: Resin
Crystal: mineral
Case Diameter: 5.5 centimeters
Band Width: 22.74 millimeters
Case Thickness: 5.3 centimeters
Bands: 1
Warranty Type: Manufacturer
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If you place your order now, the estimated arrival date for this product is:
Thursday, Aug 20
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Color: Green
Style: PRW-3510Y-8CR
So far, this watch is amazing. It looks bad-astronaut with the full-size look, military vibe, and negative display. The features exceed what I ever imagined I would want in a watch, but now that I have them, they are fun to experiment with and I really enjoy knowing they're there. MUST HAVES: - The solar power and multiband 6 (atomic sync) are must-haves, for me. I don't want to have to babysit and potty train my watch. I don't serve my watch; my watch serves me. - I wanted a watch that could display the time while the stopwatch and/or timer was in use. - I wanted big digits so I wouldn't need glasses to check the time. - I wanted digital -- while I love the elegant appearance of analog watches, I can't get over the fact that the hands obstruct vital parts of the watch every hour. That's unforgivable to me, hence my requirement for digital. - I don't want my watch to make me look like a dork. The ProTrek checks all the boxes. DISPLAY: The readout is extremely easy to read. Negative displays have a negative reputation as they are often difficult to read but this one is clear and crisp at all angles. Bright sunlight does NOT wash-out the display, it actually makes it more readable. In dim lighting it is harder to read than a positive display but it is readable, and besides, the backlight (and auto-backlight) are there for a reason. Additionally, given the large nature of the watch, I felt that the negative display suited it better. The dark appearance makes it easier to get away with having such a beefy watch. (I use the same strategy for my size 15 shoes: the darker the better.) BEEP: The alarm and beeps are plenty loud. For comparison, I also have the Casio G-SHOCK 5610u and that has a very hollow and weak alarm. The ProTrek is louder, but not obnoxious by any means. It's probably typical and what anyone would expect. EASE OF USE: If you want a watch to just throw on and intuitively know how to use everything, this one is not for you. It is not hard to use if you are willing to spend a few minutes to get acquainted with it. You will need to look up your latitude and longitude coordinates online (or on a map, I guess) and set them in the watch so that the sunrise and sunset times are accurate. BATTERY and MULTIBAND 6 SYNC: The first day I had it the atomic sync would not initiate, manually or automatically. I soon discovered ATOMIC SYNC WILL NOT WORK WHEN THE BAROMETER WEATHER ALERTS ARE ON. I'm not sure the reasoning behind this, but I assume it is a feature, not a bug. Neither the auto-receive nor the manual-receive work while the barometer weather alerts are on. (Go to the barometer mode, then press and hold the barometer button to toggle it.) WEIGHT: The watch is heavier than my previous 5610, but it's not heavy. It reminds me of my metallic band Pulsar watch. It's a very normal weight for a watch. Overall, it's not a cheap watch, but it's not extremely expensive either. It will satisfy your desire for usefulness and having cool gadgets without getting into smartwatch territory. I have finally stopped endlessly browsing watches on Amazon and youtube. I have found what I was looking for.
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Reviewed in the United States on February 21, 2026 by Nulland Void
Color: Green
Style: PRW-3510Y-8CR
Bought it exactly 4 years ago (2020) albeit for $160 while on sale. This has been my daily "driver" and I don't baby it (nor abuse it)- swim in the ocean all the time, go hiking, etc. Do rinse it after salt water exposure, but am surprised all the buttons still work and not gotten stuck. Backlight is excellent, display very easy to read in (or out of) the water. Never ran out of battery (solar charging). Barometer/Altimeter and temperature sensors are the main reasons I bought it for all my activities. Only wish it had tide tables, but otherwise this has been the perfect activity watch. Replaced the wrist band recently, other than that it works without issues. Barring some minor scuffing/scratches around the bezel, it even looks good still. Zero scratches on the crystal, probably due to the raised "lip" (crystal being recessed well below the bezel) that takes all the beating. There's occasional fogging of the crystal (due to temperature changes?), but seems to be common with all Casio watches I've owned. Will definitely buy another one (or the upgraded version), especially when it's under $200 again. Was considering upgrading to a quad-sensor Gulfmaster with sapphire crystal (GWNQ1000-1A), but seeing the condition of the used ones on eBay, which all seemed to be severely scratched up, decided to keep using this one till it dies. Seems Casio just hit the jackpot with this ProTrek for quality finishing (ion-plated) vs. a more expensive Gulfmaster that ends up looking like schit...
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Reviewed in the United States on July 28, 2024 by Ali Bazon
Color: Green
Style: PRW-3510Y-8CR
If I could only have one watch, it would be this one. I love this watch. This is the watch I wear all day no matter what I am doing. I have gotten paint acetone, automotive oils and greases, detergents, and all sorts of other substances on it. I have banged it against countless objects. I truly unapologetically use this watch. Here are the det's: Comfort: This is the most comfortable watch I have ever worn. This watch doesn't start to weigh on your wrist, get itchy, or make you feel like you have to shift it around from time to time. I wear it all day. I have even fallen asleep with it on. Durability: I am impressed with the amount of abuse this watch takes. There are some expected scratches, but even the wrist band and buckle are holding up well. Charging/battery: This is always on hi, even if I wear longs sleeves. It gets plenty of charge just from driving around or being outside for a bit. Functions: I had to calibrate the thermometer when I got it. It isn't going to give you a good reading on your wrist. It will pick up your body heat. I have found it accurate when it is not worn. Other functions work as advertised. Screen/reading: I have the autolight function enabled so it turns on briefly when you aim your wrist at your peepers. It can't be read well in the dark without it. The light is bright enough to read the full display. The light button is easy to locate and press with no light. In normal to low light, it is very easy to read. I prefer this display instead of the light back screen with dark numbers, like the previous model. But I'm sure that is subjective. Buttons: Everything is easy to press and find. There is a lot of texture on the buttons. Even with gloves on, it is easy to operate. To sum up, this is a quality watch! I won't go on about all it does and the size, that info is in the listing. It does what it promises and does it well. I would highly recommend it!!
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Reviewed in the United States on November 4, 2023 by Brian S.
Color: Green
Style: PRW-3510Y-8CR
I’m a huge Casio watch fan especially of the heavy duty ones like this one. It’s been in water for hours over the time I’ve had it from ice cold to dish washer hot. Not to mention getting bumped around in machinery. It still doesn’t have a scratch on it. And the battery is also still going! I’ve purchased $10 and $20 watches that will last a couple of years, and this one blows these out of the water! The display is large and easy to see (sometimes you need to adjust for bright sunlight). But, too me, this is a fantastic watch! I’d say I would buy a replacement, but I don’t think I’m going to need one.!
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Reviewed in the United States on June 20, 2026 by sabre03
Color: Green
Style: PRW-3510Y-8CR
This is the first watch I've ever purchased in this price range and I am NOT disappointed. I get soooo much use out of this watch and the features it offers. I have large wrists, so this fits nicely on my wrist, though folks with smaller wrists may feel it is too big. It is a little hefty in terms of weight but for what it does and how well it does those things, it's well worth the weight. The screen is absolutely beautiful even in direct sunlight and has really gokd viewing angles for a blacked out screen. The multiband 6 is almost always up to date when I wake up in the mornings. The solar panel keeps the watch topped up wonderfully even when I may not be able to get outside as much as I'd like. The automatic backlight feature is great and very very seldomly illuminates when I don't want it to. The sensor demands a very specific motion to illuminate and I love that the watch is able to decipher when the illumination is needed in terms of ambient light. The only thing I don't like is the strap. Sadly I'm one of those folks with sensitive skin and the matieral in the band just irritates the heck out of my skin and gives me a painful rash. It was an easy fix of course. Just got myself a nato strap. Of course I'd much rather use the band it came with, or be able to get a factory replacement in a more skin friendly material, but that is not at all a big deal to me considering the wonderful quality of the time piece.
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Reviewed in the United States on June 16, 2020 by Scarlet Begonias
Color: Green
Style: PRW-3510Y-8CR
Still loving this watch. Bought it December 2021. Almost 5 years old. Still looks great. Solid watch, band is super comfortable. Love the automatic light turn on which is done by a flick of the wrist and it’s set for 3 seconds. From time I leave the watch in the window sill so it can recharge. All good. Every now and then I go to a You tube video as reminder to change a setting. I don’t wear the watch every day but it looks good and has not be a problem at all. I really like the negative display . This was a good purchase.
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Reviewed in the United States on March 11, 2026 by D. Knibb
Color: Green
Style: PRW-3510Y-8CR
I got this watch last week from Amazon. First let me start by saying I am a big Casio Protrek and Gshock collector. I have 40 Gshocks and 14 Protrek watches.I also have the Suunto Core all black Military watch. I have 2 Rangeman Gshock watches. The Rangeman is my favorite Gshock. Now on to this review .I was looking on Amazon last week and saw this watch. I didn't even know this watch was out.So l went and looked up Gcentral.com . They always know when new Protrek and Gshock watches are coming out. I saw nothing about the watch. Make along story short I purchased the watch. I am a Amazon Prime member and bought it. 2 days later I had it and I love it. I have the prw3500 -1 Protrek. The watch has is the same except this is Negative Display. This is the best Negative Display watch you can see any time of day or night. The watch has a great back light . The band is so comfortable on my 7 inch wrist. The band is made of silicone resin that fits good on your wrist all day. The band color is military green. The Altimeter and Barometer and Compass work great. And 200meter water resistant. This is by far the best ABC Watch that Casio makes. I also have the Prw 3100 Negative Display watch. The numbers on the watch are the same. This watch is bigger and more durable than the prw3100 .The Prw 3100 is a great watch and durable. But this more durable like a Gshock Rangeman watch. Right now is the best time to buy this watch. You can Purchase it at Amazon for $220.00 bucks. Last year I was going to buy the Casio Prw 3510y-1 for the same price and waited. The price went up to $300.00 Now is the time to purchase this watch. Take from a man who has been wearing Protrek watches for 16 years and Gshocks for 35 Years. Buy at Amazon and save money. You won't find a better watch guaranteed. This is my favorite Protrek watch. My favorite Gshock is the Rangeman. Good luck on any watch you buy. Remember the best watch is the one on your wrist. Thanks Amazon for having the best prices. You won't find a better company than Amazon. Thanks. Update I just put a picture of my Prw3100y-b next to it they both have the same Display.
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Reviewed in the United States on March 11, 2018 by Thomas frey
Color: Green
Style: PRW-3510Y-8CR
Best watch I’ve ever owned… 6 years later!
Reviewed in the United States on June 10, 2026 by Edward Freid