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This review is mainly in response to the two star review from the truck driver who couldn't figure out how to set the time.
The watch is Multi Band 6, which means that it will set the reference time (UTC) automatically, but it's up to the user to specify which time zone the watch is in.
Therefore, you will need to press the lower left button until the watch reads "M Time" for Timekeeping mode, then unscrew the crown and pull it out. The watch LED should read "CITY". By turning the crown, the second hand will point to one of the city names on the dial and the hour and minute hand will move to the correct time for that city. For example, I'm in Chicago, so I move the second hand to say "CHI" and then you press the crown in, and screw it back down.
That's pretty easy.
As for the people complaining about mineral crystal getting scratches. Yeah, duh. It's a watch. If you don't want the face to get normal wear and tear, you really need to buy and apply a 37mm watch face protector (most are tempered glass) and apply it to the face of the watch before anything bad happens to the glass.
As for the complaints about the strap, it seems solid enough. $80 to replace it with a Casio strap is kind of ridiculous when you can use any NATO strap of the appropriate size and they shouldn't run you more than $20-30, even at a jewelry store. Some will even install them for you.
As for the alarm? Could possibly be louder, but this is as loud as any Casio watch alarm I've ever heard.
The price was decent as for the Black Friday deal. I would not pay anything close to MSRP on a watch because every watch company plays MSRP games.
The accuracy of the watch is exceptional. The quartz movement is accurate to +/- 15 seconds per month from where you set it, even if for some reason you wanted to turn off Atomic Timekeeping and go manual, which is typical for modern quartz movements. Very few mechanical movements have anywhere close to this sort of accuracy.
In the default mode of Atomic Timekeeping on, the watch is accurate to within 1 second of the official time broadcast in your region of the world. The second hand on my watch is in sync with the NTP time on my computer, as set by Chrony on Fedora GNU/Linux.
In short, you should never have to set the time on this watch in nearly any part of the world. You just need to set the time zone and let the watch take care of the rest. Casio suggests that if you can't get the watch to lock on to the Atomic Time signal, to keep it near a window for a while during the time of day that the signal is strongest in your region (which is usually during the night in the United States).
The watch is powered by solar or UV light which charges a CTL1616 watch battery. These are known to be fairly reliable and can last more than 20 years. One thing you do not want to allow to happen is to let the battery go completely dead because it can kill the battery out permanently. It's suggested to leave it in a window that receives sunlight for a while every so often.
The reviewer who couldn't figure out the time zone control also couldn't figure out how to read it at night. There's a backlight and the button is at the bottom of the watch. Push it, the watch illuminates for a couple of seconds.
Overall, the operation of the watch is quite simple once you've used it for a while.
If there's a good complaint about this watch, they should probably put a G-Shock case around it and to try keeping the look about the same. But that's a nit. If you plan to put this watch through serious abuse, get a G-Shock and you'll like that better.
I Simply read the directions and I expect to have this watch for long, long time. It’s a very handsome watch. Read the directions on how to keep the watch clean. The watch calibrated almost by itself after I unscrewed the crown. I placed the watch on my bedroom window sill for 10 hours in partly sunny conditions and that was enough to power the watch thru the solar battery; I could now read the illuminated dials and numbers in the dark. This watch has digital day/month/date display. To me, The LED button is a disguised as part of the frame, underneath the number 6 on the dial is a rectangular button, that’s the LED button. I don’t a watch with Bluetooth, picture display, or step counter. I can live without all that technology. I really like this watch.
Showed up today and I am happy! Absolutely beautiful watch. I also went ahead and ordered the screen protectors and it is installed in the picture I posted with this review. The band is comfortable but overall would have liked it to have double holes on the strap. I know it's accurate because right out of the box the time was spot on with my cell phone. Love the atomic and solar powered features. All the bells and whistles that this watch has are just icing on the cake. I am 45 and visibility was an issue with the Casio Rangeman that I originally purchased in which I was going to wear as an everyday watch. I just could not make out some of the smaller numbers on the Rangeman so I returned it and purchased the Pro Trek instead. The large numbers on the dial are perfect and the digital display is easy to read also, even indoors. I am a huge fan of all the numbers on the dial being actual numbers instead of tick marks. I personally have not had time (no pun intended) to play with all the options but from the reviews and you tube videos that I have seen it seems to me this is a pretty easy watch to use. As I said before, I am very happy with this purchase. If you are looking for a watch with options with still a bit of that old school watch vibe this would be the one.
I like this watch! I am an avid watch collector/enthusiast and usually focus on Swiss Automatics from the 50’s/60’s. As a result, I haven’t had a Casio “electronic” watch since I got as 11 y/o. However, I wanted a watch that I could wear and not worry too much about if I bumped it or scuffed it on a hard surface. So I was looking at Casio “G-Shocks” when I came across their “Pro-Trek” line of watches that I was hitherto unaware of. After researching the variety of features on the various models in this line, I settled on the 5571 model. As I was just about to “check out”, I saw the 6600 model, which essentially is the same watch, but it had the “Atomic Radio Signal” feature and was on sale for less than the 5571! Done! I was a bit concerned about the size, as I have smaller wrists and I usually wear watches in the 39mm-42mm range. This watch was advertised at 51.5mm, but I have to say, it “wears” a bit smaller. Don’t get me wrong, it’s a big faced watch, but I don’t find it offensive or “overbearing”. I also was anticipating a steep learning curve regarding the usage of features. However, it was fairly straight forward for this middle aged guy and probably a “walk in the park” for the younger generation. The build quality and fit and finish is very nice as Casios tend to be. I like the solar power feature and it only took about a half day long in the sun to “fill’er-up!” I just set it on a nightstand in the evenings and the little led bedside lamp seems to keep it “topped-off”. It’s still new, but I’ve never had any low charge issues. I love the accuracy, as it receives the signal broadcast from the Fort Collins, Colorado, NIST monitored Atomic Clocks. It also monitors other broadcast Atomic Clock signals depending on where you live. All in all, this Casio 6600 is everything I was looking for and has become my daily wearer (for now)! Definitely worth the $253.00 or so I bought it for! Hope this helps!
This watch is awesome I absolutely love it! The only problem I have is it is solar powered and I cannot get the battery to register above medium level. I have read and watched some reviews on YouTube that said you have to be patient and set it out in the sun for several days. I've had this watch for over a week I have set it in the sun for a minimum of 4 hours every day so far it will not get above medium other than that the watch is amazing I may have to get a new battery I'm not sure. It doesn't seem to affect the function of the watch but it makes me nervous that the battery will not register full or high.
I got the blue version. The strap is a matching blue, for those who asked. My wrist size is between two holes on the strap, so I swapped for a 24mm metal bracelet.
I found the watch easy enough to set up, after googling for a pdf of the manual for Casio 5571. The included booklet is incomplete.
I would have done away with the mode indicator at 10:00. It’s totally redundant, as the lcd also tells you what mode you choose. Overall, I love the design. It’s very understated.
I have too many watches, but am a sucker for novel features, and wanted a neon illuminator watch. It didn’t disappoint. The neon illuminator lights up the outlines of the minute and hour hands, and the tip of the second hand. It also slightly charges the lum.
Rotate your wrist in low light, and the illuminator comes on automatically.
The dimmest pic is with the lum almost gone. The next dimmest is after a couple of 3 second flashes of the neon illuminator charged the lum a little. The neon illuminator is lit in the pic with the lcd illuminated. The last is with the lum fully charged, next to a San Martin (brightest lum I have).
In the shade outside (indirect sunlight, I guess) the outlines of the minute and second hands have a faint, metallic green look to them, but I couldn’t capture it on camera. In regular light or direct sunlight, they’re white.
The watch gets the time over the air every night, so I don’t have to worry about accuracy.
Why 3 stars, when accuracy, ease of use, and comfort all got 5? Because one of those accurate "features" is the ability to set 5 separate alarms, as well as an alarm that beeps every hour on the hour. Setting these alarms and turning them on and off are easy enough. The downside? The alarms are INAUDIBLE! If the watch is held literally next to the ear when the alarm goes off, it is possible to catch a very faint beep, but if the watch is more than 3 or 4 inches from the ear, the alarm simply cannot be heard. Is it a big deal? Not if alarms are just a frill that you don't intend to use (particularly when mobile phones do the job just as well or better), get the watch. It's great. Looks great. Wears very comfortably (the strap is the most comfortable I've ever experienced). Keeps marvelous time. Never needs winding or battery changes, as it's solar-powered and obtains an atomic signal every night that keeps the watch perfectly accurate. The caveat is that if you expect your watch to deliver 100% on all its featured functions‑‑-including an alarm that can be heard more than 3 inches from your ear‑‑-you will be disappointed.