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Discussion Starter · #1 ·
As I said in my 'One Ring' thread https://www.watchuseek.com/f17/one-ring-find-them-one-ring-bring-them-all-well-three-anyway-563521.html I have recently received three watches and this is one of them.

I am reviewing this first as it is a fairly new model and hasn't been seen much on the forum so far.

I like Protreks and have a definite soft spot for black Ti watches. This is the 'Black Titan' PRW-5100YT-1JF with a Ti bracelet and an inside coated AR sapphire crystal. It is a thing of beauty in my eyes with its subtle polishing and general overall fit and finish with a great quality feel.

Here are a few pictures.

Barometer graph mode (very steady weather here)!

















Day mode.



































































































































The watch is hard to photograph with its sapphire crystal and its highly polished elements. The inner bezel is very highly polished. The outer bezel has a more matt finish with polished elements at various points, very subtle, very nice!.


































This combination of effects is carried through to the bracelet with its highly polished inner links.






















However, the overriding reason I got this watch was for its technology. The watch has a huge feature set, yet is mainly analogue. I was fascinated by how Casio have been able to produce such an elegant and complicated piece within the confines of a, largely, traditional watch form.

I prefer this model to the previous PRW-5000 model because of this elegance which is more pronounced in the 5100 series. I mean if you are going for this look you might as well push it as far as you can go.

Make no mistake such a fully featured ABC watch is better expressed, ergonomically, in a full digital format. However, I have a number of those with the the PRX-2000YT at the apex. Can there be a more elegant fully digital watch than this?


















So this watch has to compromise a little in function because of form but it is amazing how well it does overall . It is this form that attracts me to it and what makes it stand out from nearly all other ABC watches..

Here are some photos of the various modes. I have already shown the Baro graph and Day modes.


Stopwatch mode.


















Timer mode.


















Alarm mode. It has five alarms plus hourly signal.

















World time mode. In this mode the second hand swings to point to the city/timezone chosen and the WT is shown in digital format.


















Received mode which tells you when it last synced and swings between date and time.


















Hand set mode which displays time in digital format as well as analogue.
Of course the PRW-5100YT has the tough movement feature which, every hour, checks and adjusts the position of the hands if necessary.




















One nice feature is that every time you re-enter timekeeping mode the watch shows 'Home' and the current battery level for a few seconds before switching to whatever timekeeping mode you have set.


















Compass mode.

When you enter compass mode the second hand first swings to the compass button to indicate the switch to compass mode and then swings to point to magnetic North. You can of course adjust it to show true north if you wish.
The digital display can show the degrees or the direction as you wish with a push of the adjust button.




















However, in the compass mode the second hand is always displaying the degrees by pointing to them on the bezel as well as pointing to North.











Barometer mode.










The second hand first swings to indicate Baro mode then swings to show the pressure change since the last reading, + or - 10 units on the bezel. This is very useful as it will stay in this mode for an hour and can therefore be a good warning of fast weather change.















Thermometer mode.






















Altimeter mode.

Again the second hand swings to indicate mode and then swings to indicate height change since the last reading + or - 10 units which are programmable for value.
The watch also has a fully featured 'record' mode with all the usual recording features such as all time records etc and total height changes etc. Not enough space to cover all that here and the manual would need to be read to use these features.






















I find the whole thing quite fascinating in such an elegant and traditional package. The AR coating gives the sapphire crystal a bluish tinge in certain light and angles. The watch is a large one at 51mm wide and 56mm to the lugs. However, it wears smaller than this due to its design and it also has wings which makes for a very comfortable fit on the wrist.






















It is quite thin, even if not quite as thin as the PRX-2000, and being Ti is quite light weighing just over 100g.
The inner part of the face has an honeycomb effect which again adds to its aesthetic quality. The inner scale is supposed to help you estimate degrees in compass mode according to Casio. The QC looks to be very good as the second hand hits its markers exactly all the way round the dial and I know a lot of people look for this.

The watch has both LED illumination and very good lume. It is good to see Casio starting to get its act together over lume. I wish though that they would go to the lovely blue lume that Citizen uses sometimes.

































The conclusion is, if that ergonomic functionality in an ABC watch is your overriding priority then go full digital, if you appreciate elegance and ingenuity together with great features and are prepared to compromise a little on ease of use then this watch is a fantastic prospect.

Finally a few wrist shots.











































































Mitch​
 

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OK this watch has appeared on my radar. Just wondering how it has stacked up in the last few weeks? In particular, how durable is the black finish on the bezel?

Thanks
 

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Excellent review, thank you for taking the time, this is a watch that I have always fancied having but always got pushed aside for no particular reason
 

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Thanks for the excellent review.

I have been a fan of Casio's ProTrek 'gadget' watches for many years & am currently the proud owner of an old PRG-40 that I have worn every day for at least the last 15 years: It has been with me through hell & high water &, whilst getting through 3 straps & 5 sets of batteries, although rather beaten up, still functions immaculately (apart from gaining 2 seconds a month, as it always has).

However the shabby & scratched appearance of my good & reliable friend now leads me to consider buying a replacement (I can always resurrect it when I'm mixing concrete or using the jack-hammer!).

I fancy a metal strap on the replacement (I'm getting old & don't get up the hills so often nowadays, & therefore don't often need to wear it over gloves). So: should I go for the elegant & beautiful analogue PRW-5100T, or simply stick to the digital PRW-2500T?

I'm concerned that the 5100's 'black' finish may rapidly deteriorate (anyone had one for long enough to tell?) since I don't give my watches an easy life.

Any advice gratefully appreciated.

Cheers,

DeeKay.
 

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impressive review. By the way, how does atomic watch works on this? I know it can receive time calibration automatically or manually according to your location which covered/reached with time calibration frequencies.. But my question is, let's say you set to auto receive time calibration and your location is in China but you intentionally set your Home time to USA, will atomic time keeping automatically set the time to China standard time?
please advice. thank you
 

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Discussion Starter · #7 ·
impressive review. By the way, how does atomic watch works on this? I know it can receive time calibration automatically or manually according to your location which covered/reached with time calibration frequencies.. But my question is, let's say you set to auto receive time calibration and your location is in China but you intentionally set your Home time to USA, will atomic time keeping automatically set the time to China standard time?
please advice. thank you
The watch will search for the signal relevant to your home city. If you want to receive the signal whilst in China you would have to set the home city to one that is in range of that signal.





Mitch
 

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Thank you for the very excellent thorough review! I really appreciate you posting this b-).


I'm concerned that the 5100's 'black' finish may rapidly deteriorate (anyone had one for long enough to tell?) since I don't give my watches an easy life.
I've had my black titanium 1300YTJ for about 3 years now and I use it as my beater. The bracelet shows sign of wear for sure, but it's not really noticeable unless you pick up the watch in your hand and look carefully at it. I have one small 3mm scratch from making contact with pavement (unavoidable because I'm the first aid attendant at my workplace). The scratch is more noticeable because of its placement in a not "normal wear" location. There are other places on the clasp and bracelet where the black coating has worn off from desk diving. Because of the natural shine of the black bracelet, the grey titanium that shows underneath is not that visible at all. The sapphire crystal, of course, is perfect. I'd say after 3 years of hard work, the 1300 looks very good and is going strong--far from any "rapid deterioration" :).
 

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Recently purchased a PRW-5100YT-1BJF. Loving it so far, and must say thanks to the review for letting me choose something I knew I would be happy with. Besides the repairs (not damaged by me!) to my grandfather's old Seamaster it's the most I've spent on a watch. I have a bad habit of tearing them up, which is why I'm hoping this Casio shares some of those traits of the G Shock line I've enjoyed for so long :)
 

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Received my PRW-5100YT-1CR this morning. Have only had a short play with it but seems to be a pretty complete watch and as expected. This review helped me decide to buy so thanks. Although I have a T-Touch which has pretty much the same features, I intend the Casio to be my everyday watch and it will also be travelling with it as it has superior world time facility. Must say it is so easy to read with nicely contrasting hands to the dial.

Not sure how the CR model differs from the JF Model. Looks the same to me.
 
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